HG/T 20592  法兰 PL 20-6 RF b=3

PL20(A)-6 RF b=3

WN80-150 RF Sch40

SO 350(B)-16 RF

wn25-600tWN200(B)-160 M S=12F

wn200-300 g s.610Rk=7

BL500(B)-25 G/cRF B=64182/data/src/haibo.jpg

WN200-600RF S=4

SO 80(B)-300 RF07023 C65074.0p0-1

SO50(B)-16 RF0-1500 RJS=x

A WN750-150 RF S=2.-200-6