HG/T 20592  法兰盖 BL 500(B)-25 G38WN/6 RF80=4

bl500(b)-25 g38WN/6 RF80=4

PL300(B)-25 ff429406 s=5&a

b WN1200-150 RF=

WN40-300 RF Sch80H40/0 M/0a1.61667f1 D=Sch40Sf100F

WN200-150 RF,Sch40s s=8

47065.2 B2 δa=10-s/11Sch4000a-FFh8025RFch40

PL 80(B)-25 RF b=

WN 200(B)-16 RF3m00 RF15Af30300

20592 WN