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81/2"HM662XA 高品質 PDC ダイヤモンド ドリル PDC 油田掘削用ドリル ビット

高品質 pdc ダイヤモンド ドリル ビット、石油掘削、standstone ロック pdc ドリル ビット、販売ドリル ビット、中国の掘削は、


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至: shannxi hainaisen petroleum technology Co.Ltd
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