HG/T 20592  法兰盖 BL 700-40 FM

wn500-25mÃ-4/f161l B=28350(B)-40F0 G RF6

BL 700-40 FM

PL25-10ff=172.5

LWN 80-600 M Sc

PL200-10RF(B)6 FM S

DN500/PN16/12A

B WN 800-300 RF S=158m350-2FF/40RFS=8.7=180=80

PL350(B)-10 RF10-16F Sch16(a)-4B)-40FFpampampampamp;amp;

DN300/PN16/12A

wn100-900