单项选择题
A.一B.二C.三D.四
A.低于齿面0.15~0.20mmB.低于齿面0.20~0.25mmC.低于齿面0.25~0.30mmD.低于齿面0.30~0.35mm
A.3~5hB.5~10hC.8~24hD.12~36h
A.齿数B.齿向误差C.齿形误差D.齿厚偏差
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