shannxi hainaisen petroleum technology Co.Ltd

Date: 19th April 2016
83/4" HM662XA PDC Drill Bit, PDC pemotong untuk Pertambangan Machinery karbida bit Oilfield PDC Drill Bit/Drilling Rig PDC Drill Bits
PDC drill bit, pertambangan mesin, bit karbida, ladang minyak PDC Drill Bit, tinggi kualitas pdc bor bit matriks tubuh
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