0.7/0.75/0.8/0.85/0.9/0.95/1.0/1.05钨钢合金3.175左钻反旋钻头

0.7/0.75/0.8/0.85/0.9/0.95/1.0/1.05钨钢合金3.175左钻反旋钻头

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广东 东莞