The reasons for the leakage of high-pressured ammonia pre-heater row tubes and seals were explained, and how to handle and prevent the occurrence of similar accidents was proposed.
分析尿素装置高压氨预热器多次发生列管及封头泄漏的原因，提出如何处理及防止类似事故的发生。
The reasons for the leakage of high-pressured ammonia pre-heater row tubes and seals were explained, and how to handle and prevent the occurrence of similar accidents was proposed.
综述合成氨二段转化废热锅炉失效历程分析 ，废热锅炉列管穿孔、管板泄漏及水压试验泄漏的原因 ，提出解决对策。
“This row is a north to south transect along the East Coast, ” he said one day recently, pointing to tubes containing samples collected at sites from Cape Cod to Key West.
“这一组沙是东海岸沿岸从北至南的样本。”最近的某天他指着一些试管说。
After leading the first group of animals into position, we'd hook up the tubes and work our way down the row.
在把第一群领到位置后，我们就把那些管子接上，然后就一头头挤下去。
For carbon steel, stainless steel, plating steel and all kinds of non-ferrous metal rods, tubes, the sheet metal, screw the spot welding and welding until the row.
可进行碳钢、不锈钢、电镀钢及各种有色金属的线材、管材、板料，螺钉等到的点焊和排焊。
For carbon steel, stainless steel, plating steel and all kinds of non-ferrous metal rods, tubes, the sheet metal, screw the spot welding and welding until the row.
可进行碳钢、不锈钢、电镀钢及各种有色金属的线材、管材、板料，螺钉等到的点焊和排焊。
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