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1·So preventing cold cyclinder from piercement should start from preventing cold cyclinder from cavitation erosion.

刺漏是由气蚀引起的，因此预防冷缸刺漏应从预防冷缸气蚀入手。

2·Piercement of drilling pump cold cyclinder is a serious problem existed in field application. Piercement is caused by cavitation erosion.

钻井泵冷缸刺漏是钻井泵在现场使用中存在的一个较严重的问题。