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: Considering the contact ratio, study the method that the planar enveloping hourglass worm gear be proof-test by the strength calculation formulas of the Niemann worm gear.
中文: 研究顾及蜗轮副啮合重合度的情况下,利用尼曼蜗杆传动的轮齿接触强度和弯曲强度校核公式对平面包络环面蜗杆传动进行强度校核的方法。
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