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群鉆(倪志福鉆頭)加工圖片 |
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因?yàn)橛杏操|(zhì)合金整體的鉆頭替代,,大公司都是直接購(gòu)買,,只有小公司才會(huì)考慮刃磨現(xiàn)有的鉆頭來(lái)節(jié)約成本,所以,,慢慢地,,群鉆在市場(chǎng)中的占比就越來(lái)越小了
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