double cylinder diaphragm pump 雙缸隔膜泵
double cylinder engine 雙汽缸發(fā)動機(jī)
double cylinder jacquard machine 雙針筒提花針織機(jī)
double cylinder jacquard 雙滾筒提花機(jī)
double cylinder machine 雙針筒針織機(jī)
double cylinder mortise dead lock 鐵皮鐵閘彈子門鎖
double cylinder press 雙滾筒印刷機(jī)
double cylinder rim drawback lock 雙舌彈子門鎖
double cylinder slip pump 雙缸泥漿泵
double cylinder vertical solution filter 雙筒立式溶液過濾機(jī)
double damask 八枚花緞
double decker bed 雙層床
double decker box bag 雙格提包
double decker 兩層公共汽車
double decomposition grease 復(fù)合解潤滑脂
double diode laser 雙二極管激光器
double diode limiter 雙二極管限幅器
double diode rectifier 雙二極管整流器
double diode 雙二極管
double diode-pentode 雙二極-五極管
double diode-triode 雙二極-三極管
double disc drill colter 雙圓盤條播開溝器
double disc friction screw press 雙圓盤摩擦壓力機(jī)
double disc gate valve 雙圓板閘閥
double disc magnetic disk machine 雙片磁盤機(jī)
double disc slide valve 雙動滑閥
double disk friction press 雙盤摩擦壓力機(jī)
double disk friction screw press 雙盤摩擦壓力機(jī)
double disk harrow 雙圓盤耙路機(jī)
double disk lapping machine for indexable carbide insert 可轉(zhuǎn)位插刀雙端面研磨機(jī)
double disk lapping machine 雙盤研磨機(jī)
double disk surface grinding machine 雙盤面磨床
double dope transistor 雙摻雜晶體管
double doughnut laser 雙圈激光器
double draft bull block 二次拉絲機(jī)
double drawn black goathair 雙齊黑山羊把毛
double drawn cow tail hair 雙齊牛尾毛
double drawn goathair 雙齊山羊把毛
double drawn hair 雙齊檔發(fā)
double drawn horse mane 雙齊馬鬃
double drawn horse tail hair 雙齊馬尾毛
double drawn human hair 雙齊檔發(fā)
double drawn mixed goathair 雙齊花山羊把毛
double drawn white goathair 雙齊白山羊把毛
double drawn yak tail hair 雙齊牦牛尾毛
double drawn yakhorse tail hair 雙齊牦牛馬尾毛
double dresser and mirror 雙排斗配鏡梳妝臺
double dresser with 6 drawers 雙排六斗梳妝臺
double drill 雙鉆
double drum dryer with dip-feed 浸沒加料式雙滾筒干燥器
double drum dryer with top-feed 頂部加料式雙滾筒干燥器
double drum mixer 雙滾筒攪拌機(jī)
double duo mill 雙二輥式軋機(jī)
double effect evaporator 雙效應(yīng)蒸發(fā)器
double eight-high rolling mill 雙八輥軋機(jī)
double end 15 degree angle wrench 雙頭15度斜口扳手
double end adjustable spanner 雙頭可調(diào)扳手
double end adjustable wrench 雙頭可調(diào)扳手
double end bolt 雙頭螺栓
double end tool post wrench 雙頭刀架扳手
double epitaxial IC transistor 雙外延集成電路晶體管
double equal-angle cutter 對稱雙角銑刀
double expansion engine 雙級膨脹蒸汽機(jī)
double extension motor 雙凸軸電動機(jī)
double eye piston rod 雙眼活塞桿
double face hammer 雙面錘
double face horizontal fine boring machine 雙面臥式精鏜床
double face lady's dress 雙面女衣呢
double face mill 雙面銑刀
double face planer 雙面刨床
double face ribbon 雙面緞帶
double face valve 雙面閥
double faucet shampoo spray 雙籠頭洗頭噴水器
double fault indicator relay 復(fù)式故障指示繼電器
double feed automatic hosiery machine 雙成圈自動織襪機(jī)
double feed machine 雙系統(tǒng)針織機(jī)
double filling duck 雙緯帆布
double filter 雙聯(lián)濾器
double fired boiler 雙燃燒管鍋爐
Double Fish shortcake 雙魚酥
double flame furnace 返焰爐
double flexible coupling 雙撓性聯(lián)軸節(jié)
double fluid cell 雙液電池
double fluid ink 雙液型油墨
double flush socket 雙暗插
double focusing mass spectrometer 雙聚焦質(zhì)譜儀
double french horn 圓號
double frit glaze 雙熔塊釉
double genoa 棱條棉絨布
double glass silk wrapped copper wire 雙玻璃絲包銅絲
double gloves 雙層手套
double godet machine 雙導(dǎo)絲盤紡絲機(jī)
double godet roller spinning machine 雙導(dǎo)輥紡絲機(jī)
double goniometer 雙向測角計(jì)
double governor 雙重調(diào)節(jié)器
double grating monochromator 雙光柵單色儀
double grip garter 雙鉤吊襪帶
double groove continuous extruding machine 雙槽連續(xù)擠壓機(jī)
double handle incense burner 雙把香爐
double handle pipe wrench 雙柄管子鉗
Double Happiness biscuit 雙喜餅干
Double Happiness brand vinegar 雙喜牌陳醋
Double Happiness cigarette 紅雙喜牌香煙
Double Happiness cream sweet 雙喜奶油糖
Double Happiness crisp 雙喜酥
double hat 雙層氈帽
double hearth furnace 雙膛爐
double helical gear planer 人字齒輪刨床
double helical gear 人字齒輪
double helical mixer 雙螺漿混合器
double helical pinion 人字小齒輪
double helical spring 復(fù)式螺旋彈簧
double helical spur gear 人字正齒輪
double heterojunction laser diode 雙異質(zhì)結(jié)激光二極管
double heterojunction laser 雙異質(zhì)結(jié)激光器
double hexagon ring end adjustable wrench 六角柄端活扳手
double hexagonal pyramid 六角雙錐
double hook chain 雙鉤吊鏈
double hook 雙鉤吊鉤
double hopper automatic feeder 雙斗自動給料機(jī)
double hopper feeder 雙棉箱給棉機(jī)
Double Horse electric fan 雙馬牌電扇
double horsehide leather strop 雙層馬皮革砥
double housing planer 龍門刨床
double housing surface grinding machine 龍門式平面磨床
double image prism 雙像棱鏡
double induction regulator 雙感應(yīng)式調(diào)壓器
double injector 雙管噴射器
double inlet fan 雙進(jìn)口風(fēng)機(jī)
double insulated universal hand electrodrill 雙重絕緣通用手電鉆
double ionization gauge 雙電離壓力計(jì)
double iron plane 雙刃刨
double jack 雙塞孔
double jaw head wrench 雙卡頭扳手
double jaw pattern chain pipe wrench 雙顎式鏈條管鉗
double jersey 雙面針織物
double kayak 雙人皮艇
double kernel cake 雙仁香酥
double key 雙鍵
double knife noodle pressing machine 雙刃壓面條機(jī)
double knit circular knitting machine 雙面圓緯機(jī)
double knit machine 雙面針織機(jī)
double knit wool hat 雙股針織絨線帽
double knit 雙面針織物
double knitting wool 粗絨線
double lathe 復(fù)式車床
double layer core dispersion-shifted single-mode fiber 雙層纖芯色散位移單模光纖
double layer fibre 雙層型纖維
double layer fluorescent screen 雙層熒光屏
double layer iron sheet electric furnace 雙層鐵皮電爐
double layer lens 雙層透鏡
double layer winding 雙層繞組
double layer-stenter 雙層拉幅機(jī)
double lead cable 雙芯鉛包電纜
double lens 雙透鏡
double lever safety valve 雙杠桿安全閥
double lift double cylinder jacquard 復(fù)動式雙花筒提花機(jī)
double lift jacquard 復(fù)動式提花機(jī)
double lift single cylinder jacquard 復(fù)動式單花筒提花機(jī)
double limiter 雙重限制器
double line pen 畫雙線筆
double locked stitcher 雙線鎖邊機(jī)
double loop-sheet testing machine 雙卷層薄板試驗(yàn)機(jī)
double Macarthy gin 復(fù)式麥卡賽軋棉機(jī)
double magnet gun 雙磁鐵電子槍
double manipulator 雙面推床
double mantle lantern 雙頭紗罩汽油燈
double microscope 雙筒顯微鏡
double milled fabric 雙縮絨織物
double milling machine 雙軸銑床
double mitre saw 雙斜角鋸
double monochromator 雙單色儀
double moquette 雙面毛圈毛絨織物
double motion agitator 雙動攪拌器
double motion mixer 雙動拌和器
double motion paddle mixer 雙動槳葉式拌和機(jī)
double motion turbine 雙動式汽輪機(jī)
double motor alternator 雙電動交流發(fā)電機(jī)
double mould-board ridging plough 雙壁起壟犁
double needle bar fabric 雙面針織物
double needle bed machine 雙針床針織機(jī)
double needle loom 雙導(dǎo)緯針織帶機(jī)
double non-return valve 雙止回閥
double nozzle 雙頭噴嘴
double nozzled rocket engine 雙噴管火箭發(fā)動機(jī)
double nuclear resonance magnetometer 雙重核共振磁力儀
double oblique shade bracket light 雙斜罩壁燈
double observer rangefinder 雙觀測者型測距儀
double offset ring spanner chrome plated 鍍鉻梅花扳手
double offset ring spanner with ratchet 棘輪梅花扳手
double offset ring spanner 梅花扳手
double open end screwdriver 雙頭螺絲起子
double open end spanner 雙頭扳手
double open end wrench 雙頭扳手
double oriented silicon steel 雙取向硅鋼板
double oscillator 雙振蕩器
double oscillograph 雙電子束示波器
double overcoating cloth 雙重厚大衣呢
double padder 兩道軋染機(jī)
double pedestal desk 雙排抽屜寫字臺
double perforation cine film 雙孔電影膠片
double pick 雙嘴鎬
double piece moquette 雙層天鵝絨
double pile velveteen 雙層絲絨
double pile 雙面絨頭織物
double pipe chiller 雙套管冷凍器
double pipe condenser 雙套管冷凝器
double pipe cooler 雙套管冷卻器
double pipe heat interchanger 雙套管換熱器
double pipe longitudinal finned exchanger 雙套管式縱向翅片換熱器
double pipette 雙吸移管
double platinum resistance temperature sensor 雙支鉑電阻溫度傳感器
double plough 雙犁
double plush 雙面長毛絨
double pole single-throw switch 雙刀單投開關(guān)
double ported slide valve 雙口滑閥
double ported valve 雙口閥
double post tool rest 雙柱車刀架
double potentiometer 雙電位計(jì)
double pressed stearic acid 二壓硬脂酸
double pressure boiler 雙壓式鍋爐
double probe 雙聯(lián)探測器
double pulley 雙滑輪
double pulse and square wave generator 雙脈沖與方波發(fā)生器
double pulse generator 雙脈沖發(fā)生器
double pulse nanosecond oscillator 雙脈沖毫微秒振蕩器
double pump 雙聯(lián)泵
double punching machine 復(fù)式?jīng)_壓機(jī)
double puzzle 雙面猜謎
double pyramid 對頂棱錐
double radial engine 雙徑向發(fā)動機(jī)
double rate meter 雙費(fèi)制電度表
double reduction axle 雙減速軸
double reduction gear 雙減速齒輪
double reduction geared turbine 雙減速汽輪機(jī)
double reel winch 雙框洗滌機(jī)
double reeling frame 雙面搖紗機(jī)
double reeling machine 雙面搖紗機(jī)
double reentrant winding 雙重入繞組
double resident tent 雙人帳篷
double response controller 雙重作用控制器
double rib gin 雙肋條軋棉機(jī)
double rib 雙面經(jīng)編織物
double ribbon 雙面織花帶
double ring antenna 雙環(huán)天線
Double Ring ceiling fan 雙環(huán)牌吊扇
double rod cylinder 雙活塞桿油缸
double roll breaker 雙輥破碎機(jī)
double roll press 雙輥壓力機(jī)
double roll reversing cold-rolling mill 雙輥可逆冷軋機(jī)
double roll rice polisher 雙輥碾米機(jī)
double roll slag-crusher 雙輥碎渣機(jī)
double roller chain coupling 雙輥鏈?zhǔn)铰?lián)軸節(jié)
double roller mixer 雙輥拌和機(jī)
double rolling key clutch 雙向旋轉(zhuǎn)鍵離合器
double round blacksmith's hammer 八角錘
double row ball bearing 雙列滾珠軸承
double row centripetal cylindrical roller bearing 雙列向心短圓柱滾子軸承
double row hydraulic type pusher 雙排液壓式推鋼機(jī)
double row radial engine 雙排星形發(fā)動機(jī)
double row roller chain 雙排滾子鏈
double rubber flexible wire 雙層橡膠軟線
double rubberized fabric 雙層膠布
double S 22-degree angle wrench 雙S形22度斜口扳手
double safety pressure cooker 雙保險(xiǎn)壓力鍋
double safety valve 雙聯(lián)安全閥
double salt 復(fù)鹽
double satin de Lyons 里昂雙面有光緞
double satin ribbon 雙面有光緞帶
double satin 雙面緞
double saw 雙鋸
double scoop type excavator 雙斗式挖土機(jī)
double screen printing machine 雙面絹網(wǎng)印花機(jī)
double seal valve 雙密封閥
double seam welder 雙層縫焊機(jī)
double seamer 封罐機(jī)
double seater 雙座機(jī)
double sensor 雙電阻傳感器
double serge 雙經(jīng)雙緯嗶嘰
double sextant 雙重六分儀
double shaft hammer mill 雙軸錘擊破碎機(jī)
double shaft mixer 雙輥混合機(jī)
double shaft trough mixer 雙軸槽式攪拌機(jī)
double shaft 雙軸
double shaping machine 復(fù)式牛頭刨床
double shear rivet 雙向剪鉚釘
double sheet set 雙人被套
double shell cylinder 雙層缸
double shell digester 雙層煮解器
double shell rotary drier 雙殼旋轉(zhuǎn)干燥器
double side & double density floppy disk 雙面雙密度軟磁盤
double silk-covered copper wire 雙絲包銅線
double slide tuner 雙滑動式調(diào)諧器
double slide valve 雙滑動閥
double sliding back gear 雙滑動背齒輪
double slug tuner 雙插心式調(diào)諧器
double soap 聯(lián)皂
double source array television antenna 雙源陣列電視天線
double spiral agitator 雙螺旋攪拌器
double spiral classifier 雙螺旋分級機(jī)
double spiral mixer 雙螺旋混合機(jī)
double spiral turbine 雙螺旋渦輪機(jī)
double spline 雙列花鍵
double spring drop compass 雙簧小圈圓規(guī)
double sprocket movie camera 雙鏈輪攝影機(jī)
double spun yarn 兩次加捻紗
double squirrel cage induction motor 雙鼠籠式感應(yīng)電動機(jī)
double squirrel cage motor 雙鼠籠式電動機(jī)
double squirrel cage rotor asynchronous motor 雙鼠籠轉(zhuǎn)子異步電動機(jī)
double squirrel cage rotor 雙鼠籠式轉(zhuǎn)子
double squirrel cage winding 雙鼠籠式繞組
double stand rolling mill 雙機(jī)座軋機(jī)
double station electron beam welder 雙工位電子束焊機(jī)
double stator balancing capacitor 雙組定片平衡電容器
double stator capacitor 雙組定片電容器
double stewpot 燉鍋
double stick hank dyeing machine 雙棒絞紗染色機(jī)
double stream amplifier tube 雙電子注放大管
double stream amplifier 雙電子注放大器
double strength corrugated board 雙層增強(qiáng)瓦楞紙板
double strength glass 強(qiáng)力玻璃
double superheterodyne receiver 雙變頻超外差接收機(jī)
double superphosphate 雙料過磷酸鈣
double surface lapping machine 雙面研磨機(jī)
Double SwallowSharp refrigerator 雙燕夏普牌電冰箱
double sweep tee 雙彎三通
double swing end wrench 雙頭活動扳手
double system sound recorder 雙制式錄音機(jī)
double T-iron 工字鋼
double tang shank 雙尾刀柄
double teasel gig 雙滾筒刺果起絨機(jī)
double teasel raising machine 雙滾筒刺果起絨機(jī)
double telescope 雙筒望遠(yuǎn)鏡
double template jigger 雙刀旋坯機(jī)
double texture fabric 雙層膠布
double thinning barber shears 雙口理發(fā)梳剪
double thinning shears 雙口梳發(fā)鉸剪
double thread shoe border stitcher 雙線鞋沿縫合機(jī)
double threaded screw 雙紋螺絲
double thrust bearing 對向止推軸承
double tier net machine 雙層式窗簾花邊織機(jī)
double time constant synchronous signal separator 雙時間常數(shù)同步信號分離器
double tone oscillator 雙音振蕩器
double tricot machine 雙針床經(jīng)編機(jī)
double tricot 雙面經(jīng)編針織物
double triode valve 雙三極管
double triode 雙三極管
double trolley electric locomotive 雙觸輪電機(jī)車
double tubing mercurial barometer 雙管水銀氣壓表
double twilled merino 復(fù)式斜紋美利奴毛織物
double type filter 重合型濾波器
double type printed circuit board connector 雙件式印制板連接器
double tyre wheel 雙胎輪
double undulated preheater 雙波紋式預(yù)熱器
double unequal-angle cutter 不對稱雙角銑刀
double universal coupler 雙萬向聯(lián)軸節(jié)
double upshot furnace 直立雙膛加熱爐
double vane attenuator 雙片衰減器
double velvet loom 雙層絲絨織機(jī)
double voice cracker 雙響炮
double volute pump 雙蝸殼式泵
double wall funnel 夾壁漏斗
double wall high pressure steam sterilizer 雙壁高壓透汽消毒器
double warp flannelette 雙經(jīng)彩色條子棉法蘭絨
double warp lining 線經(jīng)里子布
double warps 線經(jīng)織物
double washstand 雙洗面臺
double water glass 雙料水玻璃
double weft brocade 雙緯花綢
double weft cloth 雙緯布
double weft fabric 雙緯布
double weft flannelette 雙緯絨
double weight paper 厚紙
double wheel lathe 雙輪式車床
double wheel pulley 雙輪環(huán)式滑車
double width jacquard decorative cloth 寬幅提花裝飾布
double winding alternator 雙繞組交流發(fā)電機(jī)
double winding synchronous generator 雙繞組同步發(fā)電機(jī)
double wing auger 雙螺旋擠泥機(jī)
double wire crosstalk suppression filter 雙線串音抑制濾波器
double wire-armored cable 雙層鐵線鎧裝電纜
double worm pusher 雙螺桿頂車機(jī)
double worsted 合股精梳毛紗
double woven fabric 雙層織物
double woven pile fabric 雙層織造長毛絨織物
double wrench 雙頭扳手
double yarn 合股紗
double zigzag rectifier 雙曲折整流器
double zone gas producer 兩段煤氣發(fā)生爐
double zone lotion 雙層化妝水
double-8mm movie camera 雙八毫米活動攝影機(jī)
double-acting air compressor 雙動式空氣壓縮機(jī)
double-acting brushing machine 雙動式刷呢機(jī)
double-acting compressor 雙作用式壓縮機(jī)
double-acting cylinder 雙作用汽缸
double-acting duplex slush pump 雙動雙工泥漿泵
double-acting engine 雙作用式發(fā)動機(jī)
double-acting hand force pump 雙作用手搖泵
double-acting hinge 雙面鉸鏈
double-acting jack 雙作用千斤頂
double-acting napping machine 雙動起毛機(jī)
double-acting paddle impeller 雙動攪拌槳
double-acting piston pump 雙作用式活塞泵
double-acting pump 雙作用泵
double-acting raising machine 順逆交替起絨機(jī)
double-acting stream hammer 雙動氣錘
double-action black japanned spring hinge 黑漆雙彈簧鉸鏈
double-action disc harrow 雙排式圓盤耙
double-action gin 雙動式軋棉機(jī)
double-action hydraulic drawing press for sheet metal 雙動薄板拉伸液壓機(jī)
double-action hydraulic drawing press 雙動薄板拉伸液壓機(jī)
double-action hydraulic press 雙作用液壓機(jī)
double-action press 雙動壓力機(jī)
double-alloy steel 二元合金鋼
double-amplitude modulation multiplier 雙調(diào)幅乘法器
double-angle iron 雙角鐵
double-arm bridge 雙臂電橋
double-arm kneader 雙臂捏和機(jī)
double-arm mill 雙臂壓機(jī)
double-arm press 雙臂壓力機(jī)
double-armature motor 雙電樞電動機(jī)
double-articulated reductor 二級鏈?zhǔn)綔p速器
double-axe cleavager 雙斧劈木機(jī)
double-axis motor 雙軸電動機(jī)
double-axle lathe 雙軸車床
double-axle platform trailer 雙軸平板拖車
double-base junction diode 雙基極結(jié)型二極管
double-base propellant 雙基推進(jìn)劑
double-base transistor 雙基極晶體管
double-beam amplifier tube 雙電子束放大管
double-beam bridge type crane 雙架橋式起重機(jī)
double-beam bridge type grab crane 雙架橋式抓斗起重機(jī)
double-beam cathode-ray tube 雙電子束陰極射線管
double-beam crane 雙梁吊車
double-beam densitometer 雙光束密度計(jì)
double-beam grating spectrophotometer 雙光束光柵分光光度計(jì)
double-beam oscilloscope 雙線示波器
double-beam spectrodensitometer 雙光束分光光密度計(jì)
double-beam storage oscilloscope 雙束存儲示波器
double-beat converter 雙拍變換器
double-beat dropvalve 雙座閥
double-beat magnetic amplifier 雙拍磁放大器
double-beat valve 雙座閥
double-bended glass 雙彎曲玻璃
double-bladed knife switch 雙閘刀開關(guān)
double-bladed plough 雙鏵犁
double-bonded hydrocarbon 雙鍵烴
double-boom jumbo 雙臂鉆車
double-boom plane 雙尾撐飛機(jī)
double-bowl vacuum centrifuge 雙鼓真空離心機(jī)
double-break push button 雙斷按鈕
double-break switch 雙斷開關(guān)
double-breasted coachman-effect robe 雙掛鈕馬夫式長袍
double-breasted cotton broadcloth frock with gold-tone buttons and belt 雙排鈕闊幅棉布外長衣配金色鈕及金色腰帶
double-breasted pinwale corduroy topper 雙排鈕條紋絨布短大衣
double-breasted plough 雙壁開溝犁
double-breasted shark-skin suit 雙排鈕鯊魚皮西裝
double-breasted suit 雙排鈕上裝
double-breasted white tuxedo 雙排鈕白色晚宴服
double-bus 雙層公共汽車
double-buttoned pyramid coat 角錐形雙鈕大衣
double-cable ropeway 雙纜索道
double-cable suspension line 雙纜索道
double-case vertical centrifugal oil pump 雙殼體立式離心油泵
double-chain draw bench 雙鏈?zhǔn)嚼螜C(jī)
double-chain stitch machine 雙鏈線跡縫紉機(jī)
double-chamber oil quenching-gas cooling furnace 雙室油淬氣冷爐
double-chamber vacuum packing machine 雙室真空包裝機(jī)
double-channel adjustable spanner 雙道可調(diào)扳手
double-channel digital low-frequency spectrum analyzer 雙通道數(shù)字式低頻頻譜分析儀
double-channel echo well depth sounder 雙通道回聲井深測試儀
double-channel echo well sounder 雙通道回聲井深測試儀
double-channel impeller pump 雙路葉輪泵
double-channel instantaneous signal recorder 雙通道瞬態(tài)信號記錄儀
double-channel Mossbauer spectrometer 雙通道穆斯堡爾光譜儀
double-channel nitrogen laser 雙通道氮激光器
double-channel planar buried heterostructure laser 雙通道板狀掩埋式異質(zhì)結(jié)構(gòu)激光器
double-channel super-short-wave wireless telephone 雙工超短波無線電話機(jī)
double-check snow plough 雙側(cè)板式雪犁
double-check valve 雙止回閥
double-coated electrode 雙層藥皮焊條
double-coated paper 雙層涂料紙
double-colour plastic extruder 雙色塑料擠出機(jī)
double-column hand-operated hydraulic press 雙柱手動液壓機(jī)
double-column hydraulic planer 雙柱液壓刨床
double-compound engine 雙聯(lián)雙脹式蒸汽機(jī)
double-compound turbo jet 雙軸渦輪噴氣發(fā)動機(jī)
double-cone antenna 雙錐形天線
double-cone blender 雙錐體混合機(jī)
double-cone clutch 雙錐離合器
double-cone coiler 雙錐式卷取機(jī)
double-connected rectifier 雙重連接整流器
double-crank mill 雙曲軸軋機(jī)
double-crank press 雙曲軸壓力機(jī)
double-crank shaft engine 雙曲軸發(fā)動機(jī)
double-crank shaft 雙曲軸