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钻杆

摩擦焊接钻杆
 油井钻杆
 螺纹杆
 锥形杆

分类

钻杆

摩擦焊接钻杆
 油井钻杆
 螺纹杆
 锥形杆

How to maintain friction welding drill pipe on time during decoration and construction

China Friction welding drill rod

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