121/2" HM662XAG Oilfield Drill Bit per formazione dura arenaria di perforazione

PDC bit fabbricazione pdc bit di perforazione del diamante pdc trapano bit pdc trapano bit inserti


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卖方: SHENZHEN PORSTAR ELECTRONICS CO LTD
卖方: SHENZHEN PORSTAR ELECTRONICS CO LTD
卖方: SHENZHEN PORSTAR ELECTRONICS CO LTD
卖方: SHENZHEN PORSTAR ELECTRONICS CO LTD
卖方: SHENZHEN PORSTAR ELECTRONICS CO LTD