GB/T 12459  弯头 DN 50-1190EL

DN 50-11 90EL

SO 25-150 RF

1 RF 500-0.6 δs=8

LWN100-150 RF Sch40 H=229

WN 50-300 RF Sch40s

WN50-300RF8 rf s1f b= b

B WN800-150 RF SCH40S33M Sc2

BL 200-10 FFF52.5516 rf5so50.3

BI45009PL2/5 δ1=12 WN1000-150 RF=7rfd0

BL15-16RF1.0-10RF2= f1=S=4.5am0 WN