HG/T 20592  法兰盖 BL 500(B)-25 M S=0085 d= k= b1=/ b

BL500(B)-25 M S=0085 d= k= b1=/ b

WN 125(B)-40G D=250 K=206 d=182 C=24 H=70

DN 15×15×10-3 TRp;nbsp;thread-create-1.html

47023 rf900-6.4-1=26 δ2=26 δ4=28 h=400=6R0.72FS

bl250(b)-900 rf

WN 150-150 RF��-11255

WN50(B)-40 FM S=5)-10r0154-1.0/F300