再谈怎样看待H1~31-67《高压管、管件及紧固件通用设计》
재담즘양간대H1~31-67《고압관、관건급긴고건통용설계》
Re-discussion of How to Trest H1~31-67 "General Design of High Pressure Pipe, Fitting, Gasket and Bolting"
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