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cemented carbide steel 94 core drill bit (hard alloy drill price)

Summary: 硬质合金空心钻头硬质合金取芯钻头 空心钻头,又名取芯钻头或开孔器钻头分类高速钢钻头,硬质合金钻头,钨钢钻头削切深度 35MM,5...

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