The briefing covers quality of the shell pierced by the three-high piercing mill, thespecific rolling failures and countermeasures thereagainst.
简要地
三辊穿孔机所穿毛管
质量及该穿孔机特有
故障和预防措施。
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Like nuclear reactors, precautionary systems prevent our factories, wellheads, and drilling rigs from bursting into flames; but those systems may fail, sparking industrial fires, releasing pillars of black smoke, and further polluting the atmosphere with greenhouse gases.
像核反
样， 预防系统可以防止我们的
厂、井口和
井平台起火；但这些系统可能会
生故障， 
业火灾， 释放黑烟柱， 并进步用温室气体污染大气。
