HG/T 20592  法兰盖 BL 500(B)-25 M 2-

BL500(B)-25 M 2-

WN125-150 RF SCPL2F S=404=1530s6rf)-RF

pl400(b)-10rf b=b=3MRF15)

1 ff 900-0.25,ÃŽ02wn

BL65-16 RF CAA=165.5)-1

LWN80-600 RF sch40/)-16 RF S=6)-16RF5-

BL 15-300 MB34fF0-1.-Sch1222Nquotm

"JWN25*50-150RF S=4

wn300(b)-40rf63 M S