shannxi hainaisen petroleum technology Co.Ltd

Date: 23rd February 2016
6 "Bits ghap Separ hm342xa pdc qeq Bit qeq ghap pdcdrill Bit Sandstone, Limestone lom Matrix
pdc qeq bits Sandstone, Limestone, Separ qeq bit nagh bit oil SIp 'ej pdc qeq bit
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