HG/T 20592  法兰盖 BL 300-16 T150-10RF2ampamb=3

hg/t20592 bl300-16t150-10RF2ampamb=3

20592 pl500(b)-6rf400

20615WN250-300RF

WN 32(B)-16 RF S=3-4.0Lu0082100 RF)-1

DN350-PN16 WN RF Sch40 H=94 C=42N RF Sch40 H=

WN20-300RF S=10-190500 RJ.55rx8)19

法兰 WN200-150RF Sch40s

LWN20-300 RFSch40S6FMFRF0

SO