以下为句子列表：
英文: Gearbox: what kind of gear in the gearbox? Worm gear unit, helical gear set, or spur gear unit?
中文: 最佳答案（此答案并不代表本站观点）变速箱：变速箱里有哪些种类的齿轮？蜗轮，斜齿轮或圆柱齿轮？
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英文: Note: Regarding the manual ball valve, suggested to use the spanner, suggested to use the worm gear and worm drive.
中文: 注：对于手动球阀，表示建议采用扳手，表示建议采用蜗轮蜗杆传动。
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英文: Note: This table establishment for the convention flange connection worm gear and worm drive fixed ball valve model, the major parts material and the suitable operating mode, other requests and its model please sees the ball valve model establishment meth
中文: 注：本表为常规法兰连接蜗轮蜗杆传动固定球阀的型号编制、主要零件材料及适用工况，其他要求及其型号编制见球阀型号编制方法。
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英文: Note: This table for the convention flange connection worm gear and worm drive metal hard seal fixed ball valve model establishment, the major parts material and the suitable operating mode, other requests and its model establishment sees the ball valve m
中文: 注：本表为常规法兰连接蜗轮蜗杆传动金属硬密封固定球阀的型号编制、主要零件材料及适用工况，其他要求及其型号编制见球阀型号编制方法。
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英文: Single speed motor drive connected to a Helical Worm Gear and a totally enclosed Connecting Gear Box with heavy duty chain drive to the rolls and with fixed friction ratio according to customers request (normally 1: 1,2).
中文: 系统带有同螺旋涡齿轮以及全封闭齿轮箱的单速马达，它带有重型链传动系统并可根据客户的需要固定摩擦比（通常为1:1.2）。
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