GB/T 12459  弯头 DN 400-Sch8090EL/M0615

DN400-Sch80-90EL/M0615

wn250(b)-16 rf a=273 b=257 s=8

wn500a-300 rf

WN200B-16RF1L326fSJ-R9eS-RFWN S25Fm��F Schch40 SC-1

wn32(b)-25 fm s=3.5

B WN1300-150 RF

wn80(a)-25fmRF6S0S(5dn�

1 RF 700-0.6 Ш®Вҙs=8

WN40(A)-40 RF S(5(A)-25 RFSch8 D

PL 50(