GB/T 12459  弯头 DN 450-Sch4090ELWN/310 BSR

DN 450-Sch40 90ELWN/310 BSR

WN200-900m(300-f/0SFRF S0 r=FC1H80S-f/@A B

WN125B-40RF S=12

WN 150-600 RFh41F B6rfRF5/72-165RFM1

WN32-63 RF B=3 s=2=190l-16 8000.6

WN400-900RJ SCH806.5-

WN100-300RF Sch80s.0/616RFF16281MJ0S0-16r

PJ/SE 25-16 RFR

lwn250-30