HG/T 20592  法兰盖 BL 200-10 RF=1043 b==6�0-@RF@443 b==6500 R

BL200-10RF=1043 b==6�0-@RF@443 b==6500 R

LWN 600-900 RJ SCH40m/63

WN 20B)-16RF0RWNS4-2

SO 25(B)-40 RF=080 C=47MSc6-RFR60Sh80@

PL 500(B)-16 FF

BL 500(B)-16 RF

WN25(B)-40MF151

WN 600-300 RF Sch40s-s

SO20(B)-25RF50rf5

WN 600-900 RJ S=f6R-fpampampa8009