HG/T 20592 法兰盖 BL 50-10 TM FM FM FM FM FM FM FMch40SM�S160hwn1RF��mpampampampampamch40B)0 RF.0@RF8FFMRF@RFFSf sch2S5 RJbР�5 RF�418 d=145.0rFu50/@-RJ5-R RR
HG/T 20592 法兰盖 BL 50-10 TM FM FM FM FM FM FM FMch40SM�S160hwn1RF��mpampampampampamch40B)0 RF.0@RF8FFMRF@RFFSf sch2S5 RJbР�5 RF�418 d=145.0rFu50/@-RJ5-R RR