GB/T 12459  弯头 DN 600-Sch1090EL4023-20

DN600-Sch10 90EL4023-20

wn 500-300 rf1h40 a=48 s=3/S=30R RF

wn 80(b)-25rf200-40r6 δ2=14

pl15-16rf D=94.5 C=13

pl250(b)-16fFH160=

SO 400(B)-16 RF

2 CRF 600-2.5 δ1=84u0(S(=62/940pl.6FF-h4026 RF

DN200-PN25 WN RF Sch40/60-145)-16 RF5aamp

3 FM 600-2