GB/T 12459  弯头 DN 80-490EL=20 d=1

DN 80-4 90EL=20 d=1

WN450-300 RF Sch40s80 W

WN 6"-600 LM Sch60

3 M 2300-0.66rfHG/

1 FF 1200-0.2520δs=12 Su0080/u04.

WN 20"-150 RF Sch/00B= D54

LWN150-600 RF Sch4 RFs=1/ RFT166RF0

2 CFM 1600-1.620δ1=6

wn80(b)-16 rf s=4-4mp Ach40S/h

SO350()