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≥80 Hour Kumulierte Dauer Tricone Drill Bits Forging Processing Type Air Or

Hejian Ruida Petroleum Material Co., Ltd.
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≥80 Hour Kumulierte Dauer Tricone Drill Bits Forging Processing Type Air Or

≥80 Hour Kumulierte Dauer Tricone Drill Bits Forging Processing Type Air Or

Product Description: Main stratigraphic distribution 1. The Quaternary alluvial layer comprises humus soil in the upper part, with a thickness varying between 1.0-4.0 meters. The lower part consists ...

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