But in actual applications, spiral bevel gears on rigs are often damaged. 但在實際應用中，鑽機中弧齒圓錐齒輪常損壞。
Deviation measurement of tooth thickness and conical point of straight bevel gear by using steel bail was studied and approached. 對鋼球法測量直齒圓錐齒輪齒厚及錐項位置誤差檢測進行了研究和探討。
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