shannxi hainaisen petroleum technology Co.Ltd

Date: 18th April 2016
Spesifikasi 91/2" API berkualiti HS952XA terendah harga Petroleum badan keluli PDC gerudi bit
badan keluli gerudi, berkualiti, harga terendah, petroelum gerudi bit, bit gerudi batu keras, batu bor bit, bit gerudi pdc, bit gerudi diamond
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