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Terms for subject Oil / petroleum containing 心盘 | all forms
ChineseEnglish
偏心圆盘eccentric disc
卡盘补心spider bushing
同心刻度盘concentric dial
方钻杆补心下入盘kelly bushing stabbing skirt
方钻杆补心导盘kelly bushing guide skirt
转盘方补心rotary kelly bushing

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