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91/2" HM952XA най-продажба на едро пясъчник Pdc малко за добив на нефт и газ сондажни

Проучване на нефт, газ пробиване, добро качество, на въглища добив,


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至: shannxi hainaisen petroleum technology Co.Ltd
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高品質 pdc 金剛石鑽頭、 石油鑽探、 砂岩岩石 pdc 鑽頭,為銷售鑽頭,在中國鑽井
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