HG/T 20592  法兰盖 BL 1600-10 RF00B00c

BL1600-10 RF00B00c

WN50(B)-300FM1.0/5 & 0/mm 16Mn Hg t

WN 6"-300 RF S=5.5

PL50(A)-16RF5amp

3 FM 1000-4.0h4000-150

WN 150-100 fM S=8-40 rf10rfh170 H=190/300 r70-1650/

wn40b-40rf S=≥3.5

JWN 50×65(A)-16 RF

wn80-25rf s=10.5 &;amp;amp;amp;amp;amp;