2001年大修期间，对三塔进行了全面检验，分析原因后采取有效错施，解决了表面裂纹问题，至今未出现大修以前的损坏现象。
During the overhaul period in 2001, an all-sided inspection was made to the three towers, causes were analysed, and measures were taken, the problem of surface cracks have been solved.
结合某化肥厂历次大修对凉水塔木结构的检查，对其进行了生物检验。
This article makes a biological test on the wood structure according to the many checks for the wood tower …
新安装或大修后的氢气系统必须做耐压试验、清洗和气密性试验，符合有关的检验要求，才能投入使用。
After a new installation or maintenance for hydrogen system, pressure test, flushing and gastight test must be done.
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