... tapped hole；螺纹孔 tapped plate；螺纹板 tappet assembly；挺杆总成 ...
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The bottom side of the line plate shall be cleaned up (no oil stains), and all the screw holes on the plate shall be tapped with screw taps.
线条板底侧面清洁干净(不能有油污)，板上螺丝孔全部用丝攻攻牙一次。
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