NB/T 47023  法兰 RF 2000-0.6 δ=70 h=165F S/6RF0 rf sch400 h=165/δn=(a)-1

47023 rf2000-0.6 δ=70 h=165F S/6RF0 rf sch400 h=165/δn=(a)-1

WN 50(B)-63 FM S=5

HG/T20592 WN250(B)-40MN6cr19hch40/)-1F Sch RFRF60-

BL 600-40 RF Sch80SFF B=596

BL 700-16 RFF06004

NB/T47023 FM1800-0.25

PL150B)-16ffFMF2012

BL500-600 FM S)-/R

SO 65(B)