GB/T 12459  弯头 DN 25-Ⅱ-3180EL

DN 25-Ⅱ-3 180EL

SO 500(B)-16 RF

NB/T47021 RF1000-0.6

20615 WN300-600 RFch10Sch40sFh=390

SW 1"-150 RF

DN 20-Sch40S 90EL

PL 80(B)-16 FF B=93 b=4

WN 1"-300 RF

WN150(B)-25RF S=5

PL 150(B)-6 RF@10 s-2009PL 1000 f1=3 RFRFF S��30Fn-1RFF221 c