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電鍍金剛石鉆頭Electroplated diamond drill bits復合片不取芯鉆頭The composite sheet does not take the core復合片取芯鉆頭Composite piece coring drill bits熱壓鉆頭Hot press drill bits擴孔器Reamer礦山鉆頭Mine drill bits鉆桿鉆具Drill pipes and tools
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電鍍金剛石鉆頭Electroplated diamond drill bits復合片不取芯鉆頭The composite sheet does not take the core復合片取芯鉆頭Composite piece coring drill bits熱壓鉆頭Hot press drill bits擴孔器Reamer礦山鉆頭Mine drill bits鉆桿鉆具Drill pipes and tools