... trapezoidal thread broaching tap 梯形螺纹拉削丝锥 trapezoidal thread tap 梯形螺纹丝锥 trapezoidal wheel 梯形砂轮 ...
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trapezoidal thread broaching tap 梯形螺纹拉削丝锥
tap for trapezoidal thread 梯形螺纹丝锥 ; 螺孔钻
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