shannxi hainaisen petroleum technology Co.Ltd

Date: 18th April 2016
12 1/4" HS652XA badan keluli Pdc Diamond bit saiz/API telaga minyak Pdc gerudi Bit
badan keluli, pdc gerudi bit, bit gerudi diamond, 5 bilah gerudi bit, bit gerudi barisan tunggal, batu pasir penggerudian
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