HG/T 20592  法兰 PL 50-16 FF D=130S/Sâb)-ÃF 20615-50rfB)-16 RF S

pl50-16ff D=130S/Sâb)-ÃF 20615-50rfB)-16 RF S

SO 300-150 RFВ 35RF160K=120h4/63/-300G5BH4022800-40 RF6FMF

WN50-16 RF

wn400-40t)-150RF/)40-10

B WN750-150 RF 80 /150h/ch400.0-1.03

BL500-6RFFFSSmpam-155RFRF2.5rf…�

B WN 32"-150 RF B=Sch40S1.0