请问 vessel trim 什么意思? 2) it's been some time since i worked on p&ids as a process engineer, but your understanding of the vessel trim appears correct to me. the loose piping items connected to a vessel get a linenumber including pipespec, pound class etc and that is called the vessel trim. you have to think about valves on vents, on drains or level gauges. 标红的句中的 that 从语法上分析是指 linenumber. 这也和楼上luding版主的意思相似。查看更多