GB/T 12459  弯头 DN 100-Sch4045E3DRF2=8ch8

DN 100-Sch40 45E3DRF2=8ch8

WN 4"-300 RF Sch40

法兰 SO400-16 RF

wn150-1500 m

SO 100-150 RF

法兰 WN 250-16 RF

法兰 pl 200(b)-10 ff

PL65-16RFSCH3/)-am18RF-1u

B WN 56"-150 RF B=1374

法兰WN65-25 T=2.9RFH40-16;amp;amp;amp;ampampampampamp;