The scratch, cold welding and abrasion are three kind of thread failure.
擦伤、冷焊和粘着摩损是粘扣失效的三种类型。
The failure of collar connection thread is one of the prime drill tool failures.
石油钻铤螺纹联接失效是钻具失效的主要类型。
The failure of collar connection thread is one of the prime drill tool failures.
石油钻铤螺纹联接失效是钻具失效的主要类型。
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