GB/T 12459  同心异径管 DN 450×10-Sch20RC00-s/

DN 450×10-Sch20 RC00-s/

wn 600(b)-16 rf hg/t2059-10RF

47023FM400-6.4-f/@WN100-150168

PL80(B)-16 RF D=190S=

WN80-150 RF Sch40F5ch Sch60M53FF=2.0.5â-RF=

BL 80-900 RJ515cpampa=10001

WN300-150 RJ Sch-10s

WN 80(B)-100 RF S=10

47023 FM1400-2.5/100/uA50=9