HG/T 20615  法兰盖 BL 40-300 RF)-40fm/(B)-100 RRF.6h80/

BL 40-300RF)-40fm/(B)-100 RRF.6h80/

WN 12"-300 RF S= S=10.31

DN20-PN40 WN T Ⅱ S=4

SO 150-300 MRF B=695 A=71e

WN350-150RF A=380B=360

SO 25(B)-16 RF=6F5 H=2pam

PL500-25FF B=d=S S00-

pl25(a)-40 rfamB0RFS=1rvletMCH10

wn150-900rj bã¯â¼â 13

WN