Author Frederick Frederick QC Inspection, semi-boring, boring semi-refined single aperture at the end of cushion for 0.6mm.
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semi-boring 半精镗
Semi-fine boring 半精镗 ; 精镗
semi-jig boring 半坐标镗削
semi jig boring 半坐标镗削
semi-fine boring machine tools 半精镗专用机床
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