GB/T 12459  同心异径管 DN 300×20-Sch40RC-150 RF0 R

DN 20×300-Sch40 RC-150 RF0 R

PL 150(B)-16 FF

&ampampampampampampampampampampampquothg20615 wn400-600rj&ampampampamp;amp;amp;ampampampampamp;quot

WN80(B)-16 RF

1 RF 400-1.0 δs=5

WN20(B)-25RF S=5mpampamp

WN 450-300 RF

WN 65-150 RF Sch10S

SO 24&