HG/T 20592  法兰 PL 800-6 RFRFd=

PL800-6RFRFd=

3 FM 500-6.4 δ

bi140s100=75 hF S-2

WN250-300RFRFmd

WN80B-16RFb10RF S

lwn25-150 rfCH4/000-150 RFu00c3/u0125R

B WN 700-150 RF S=10

PL400(B)-16 RF/p��В°Р

LWN80-300 RF Sc50-2. rf s/ch

DN25-PN16 BL RF Ⅱc/5 k80/RF S=4.5��БRrf8H