GB/T 12459  同心异径管 DN 200×150-Sch20SRCmpa16rf0-

DN 200×150-Sch20S RCmpa16rf0-

bl450(a)-10rf �

WN50-600 RJ Sch80

wn15-16 rf s=ch4

BL 15-900 RJMFch40½40Fundef4.awsch40d

WN50(B)-63MS=66rf-1.0

WN 40-150 RF Sch40Spampampampampw4.40336PL15

47021 M500-1.0/421.0

bl250(b)-25g.0/7 S

wn40(B)-3