HG/T 20592  法兰 JWN 40×80-25 RF S=≥3.5

JWN 40×80(A)-25 RF S=≥3.5

PL 300(B)-6 RF D=439 C=23

PL150 -40RF

SO 32(B)-16 RF

BL500-40 T

dn125-pn6 wn rf Ⅱ s=3.5

20615-wn50-150 rf sch7 R120 RF0150F S=3.0�

pl100-16rf b=3 aa=142rf5/1./s=1063 fmFFRFam@F150 LGtoFa0Cquots00

PL600(A)-16 RFpf25RF2