GB/T 12459  弯头 DN 550-9.5245EL0RF s=8am2/u0 S=S=6

DN 550-9.52 45EL0RF s=8am2/u0 S=S=6

bl450-150 m sch40/S

so250-150rfBfm5RFf s=4 b/H2/ S=/RF15

SOH RF 20K A 25A

WN25(A)-25RF S=2.5rf sc d�-1=4=32/61

WN50-160M0116RF FF�00Fmpa1016

wn150- 300RFFswn25-100h430/62 r-1.-

PL25-16RFrf40 Sch40S=17

3 FM 50