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Cangzhou,Hebei,China China
ZS series bits body material is made of steel of high quality .The good steel material and thinner blade design as well as deeper junk slot design hel
ZM series matrix body PDC bit for full scale drilling applications , Via high quality matrix materials and FEA analysis can be designed in order to en
الشخص الذي يمكن الاتصال به Mr. Linda CH
عنوان Cangzhou, Hebei
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