GB/T 12459  弯头 DN 50-Ⅱ-1290EL

DN 50-Ⅱ-12 90EL

47023 M800-6.4

PL 80(B)-25 FF b-0 c-10 d-

WN200(b)-16RF B=1590/8=73/50RF½8h16g0=6RF90

WN 100-150 RF0rf sc S350-1.0 RJ6

47021 fm550-1.0 δ=54

WN50B-25 RF S=5RF0R

SO40-25RFRRF80-165rf5

WN150-16T D=265 K=228 NA=180 AA=161 R= C=18

47