HG/T 20592  法兰盖 BL 400(B)-16 RF d=575 c=34 d=496 f1=3

bl400(b)-16 rf d=575 c=34 d=496 f1=3

BL500-25 RF D=660 K=615 d=563 C=42 L=

BL 25-300 RF0rf00r4.B=2024fh6п©Б∙║п▒Б■─Б∙▓п▒Б■─Б√═

DN80-PN160 WN RF Ⅱ S=9 D=1065 B=855 K=1000 n=28

WN300(B)-40 RF D= K= N= B=1 d= H= C= L=