GB/T 12459  弯头 DN 1000-Sch4090EL

DN 1000-Sch40 90EL

WN 2"-150 RF S=5.54

WN 150-300 G Sch40S

DN450/PN16/01B

WN40-16 fm01 nb0 R-200F-16.F5 RJBchtml251@F5

WN 250-900 RJ

DN100/PN16/01B

wn300(b)-16 rf s=4

WN100-16RFSذ �

WN 600-150 rf sch40 rf s=10�-4.0/70-150h80S@ RF5=6J��RF