HG/T 20592  法兰 PL 450(B)-6 FF20/758=575802MF1

PL450(B)-6FF20/758=575802MF1

PL300(B)-10 RFRF3R0a10S.RF880030

PL 80(B)-10 RF

a 480000B-16RF S=10 WN25(B)-16 RF15Â3

1 FM 500-1.0 δs=10

1 RF700-1.23 rf1rfRF n=

WN500(B)-16RF S=10

47021 rf550-0.6 –†“Э–Т¬©–†“±�

PL 200(B)-16 RF

PL3