HG/T 20592  法兰盖 BL 450-6 FFJ R

BL 450-6 FFJ R

WN 50-600 RF S=13��Т“-10Sï؟½ï؟½ b=4/a/r

SO 400(B)-16 RF15a

47023 rf800-1.6 δ1-13

wn300b-25rf

LWN20-600 RF N=48m6/13rذ²â€¢ز—ذ،ز–ذ²ز¯زکذ ز‌ذ²â�

LWN80-150 RF Sch4S/fmF/0F1–†

wn20-300 t s/