这两处的service如何理解?(关于PID说明)? different opinion for you reference! 1. show line designation of major process and utilities lines including service symbol ,(表示用于何种物料的 ,“物料代号”) line number(管线号), size(尺寸), spec(规格), insulation requirement(保温要求). 2. process data required for completion of instrument datasheets of control valve, flow meter, analyzer etc. safety relief data indicating process services (赞同“工况”,或“工艺要求”等)(not including utilities, fire case, etc) 查看更多