GB/T 12459  弯头 DN 25-4180EL∙400mpampampameb4

bl50(a)-16 rfS100F0B)603F040@40H40=1tml

DN 25-4 180EL∙400mpampampameb4

BL 50-100 RF/A BL1000/0rc2/dat

wn150(a)-63rf916f050R0-25R

3 FM 350-1.6 δ0=20

1 RF 700-0.60004.0S=10

47065.3 B3-I,δ

WN20(a)-16MCH8025(b)-6ffR-1

B WN 1000-300 RF S=16

WN 25-300