GB/T 12459  异径三通 DN 125×125×40-Sch40TR0Nt05ed0S(

DN 40×40×125-Sch40 TR0Nt05ed0S(

WN200-40 G0ºå40s=80δ1=0-,S5-8

SO20-300RF0592CH6/

WN 100(B)-25 RFf0(b)-16 rfJRFNRFRF

WN 50(B)-16 RF S0CH40S-01.10RF21RFï ã=11

wn450 -600 rf/

if 50(B)-16 FF

20592pl450(b)-6ffl/Â20M7700-1.0 пҝҪ522.4mpam

WN 3&q