GB/T 12459  弯头 DN 50-4.5545E3D K168RF0RF-016 /

DN 50-4.55 45E3D K168RF0RF-016 /

LWN400-300 RF H=225¶S

WN 15-300 RF1.6f s800K=-f

PL50-25RF)40RF S=00 Sc60-

SO600(B)-16 M150-h80/

WN40-300 THF.60.Mn12i0 Scamp

BL 600-16 RF0/25pampampa

WN450-25RF S=12 &ampampnbsp

bl25-16rfh20HG/forum.f2.

so500-300m