GB/T 12459  弯头 DN 100-sch4090ELtg-=RF421M49-�

dn100-sch40 90eltg-=RF421M49-�

nb=t47023 fm 350-1.0=5c/D=255 N=138

BL40(B)-25RF

wn50-600rf sch/=7 n=8)30020.CH40S22 R

A BL1150-150RFS/5FRF=60/70-.6MRF

DN 200×200×90-Ⅱ-4 TR

BL 50(B)-16 RF=6

SO 80(B)-16 FF40Sh4050.8FÃ2101=S=4

SO250(A)-16FFRF833.