Odometer 里程表
Odontometer (齒輪)公法線測量儀
Off-gas 廢[排]氣
Off-position 斷路位置，非工作位置
Offset 偏置；偏心
Offset cab 側量駕駛室
Offset camshaft 偏置凸輪軸
Offset connecting rod 偏位式連桿
Offset cylinder 偏置氣缸
Offset frame 偏置車架
Offset piston pin 偏置活塞銷
Oil brake 液壓制動器
Oil can 油壺，加油器
Oil circulating pump 機油循環泵
Oil cleaner 機油濾清器
Oil conduit 油道
Oil-control ring 油環
Oil coolant 冷卻油
Oil cooled piston 油冷活塞
Oil cooler 機油冷卻器
Oil deflector 導油器，擋油板
Oil delivery filter 輸油濾清器
Oil drain hole （活塞環槽）回油孔
Oil drain cock 放油栓
Oil drain plug 放油塞
Oil emulsifier 潤滑油乳化劑
Oil emulsion 乳化油
Oiler 加油器，注油器，油壺
Oil feeding line 供油裝置
Oil feed line 供油管路
Oil filler 加機油口
Oil filler pipe 加油管
Oil film 油膜
Oil filter 機油濾清器
Oil filter body cover 機油濾清器口蓋
Oil filter case 機油濾清器殼
Oil filter clamp 機油濾清器夾
Oil filter net 機油濾清器網
Oil hand pump 手動機油泵
Oiling 加油，潤滑
Oil inlet 進油管
Oil jack 液壓千斤頂
Oilless bearing 含油軸承
Oil level 油位，油面
Oil level dipstick 量油尺
Oil level warning sensor 機油油量報警傳感器
Oil loam 油泥
Oil mist 油霧
Oil nipple 加油嘴
Oil outlet 機油出口
Oil overflow valve 溢油閥
Oil pan 機油盤，油底殼
Oil pan drain plug 機油盤放油塞
Oil pan gasket 機油盤襯墊
Oil pan seal 機油盤密封條
Oil pipe 機油管
Oil pistol 油槍
Oil pressure 油壓
Oil pressure ga(u)ge 油壓表，機油壓力表
Oil pressure indicator 油壓表
Oil pressure regulator body 油壓調節器體
Oil pressure regulator gasket 油壓調節器襯墊
Oil pressure regulator packing 油壓調節器墊圈
Oil pressure regulator valve 油壓調節器閥
Oil pressure relief valve 油壓安全閥
Oil pressure sending unit 油壓表傳感器
Oil pressure stabilizer 油壓穩定器
Oil pump 機油泵
Oil pump body 機油泵體
Oil pump body set screw 機油泵體固定螺釘
Oil pump cross gear 驅動機油泵螺旋齒輪
Oil pump driven gear 機油泵從動齒輪
Oil pump driving gear 機油泵主動齒輪
Oil pumping （活塞環）泵油作用
Oil pump location dowel 機油泵定位銷
Oil pump safety valve 機油泵安全閥
Oil pump screen 機油泵濾網
Oil pump tube 機油泵管
Oil pump tube bush 機油泵管襯套
Oil quenching[hardening] 油淬
Oil regulating valve 機油調節閥
Oil renewal 機油再生
Oil reservoir 油罐，制動液罐
Oil resistance solid tire 耐油實心輪胎
Oil screen 濾油網
Oil screen cover 濾油網蓋
Oil seal 油封
Oil seal retainer 油封護圈
Oil shield 油擋
Oil tank 油箱
Oil tank trailer 油罐掛車
Oil tank truck 油罐車
Oil tappet 液壓挺桿
Oil temperature 油溫
Oil temperature regulator 油溫調節器
Oil thermometer 油溫表
Oil thrower 拋油環
Oil tight 不漏油
Oil trough 油槽
Oil wiper 擦油器
Oily varnish 油性漆
One cylinder engine 單缸發動機
One hole nozzle 單孔噴嘴
One-piece rim 一件式輪輞
One-way road 單行線
One-way traffic 單向行駛，單向交通
One wire system 單線制|<< << < >>