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nocuous adj.有害的;有毒的。

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In the process of construction , some special geological hazards will be met because of the great depth and long distance , such as high external waterpressure , watergushing , high geostress , rockburst , high geotemperature and nocuous gas and so on . these geological hazards become the main restricted factors of tunnel construction 大埋深將使隧洞開挖施工時遭遇到如高外水壓及高壓涌水、高地應力及巖爆、高地溫、高瓦斯有害氣體等一系列地質災害問題,這成為制約深埋隧洞建設快速發展的主要因素。

The comprehensive effect of partial acidlity of working medium , flowing status of fluid , nocuous material in atmosphere , together with the overlong usage , largely increased the corrosion rate and caused the leakage 結果表明,泄漏的主要原因是焊接缺陷導致焊縫區發生縫隙腐蝕,而工作介質的局部酸性、流體的流動形態、大氣中有害物質、溫差應力等綜合作用,加上使用期過長等加劇了腐蝕,導致該塔泄漏。