GB/T 12459  弯头 DN 350×25-Sch80S90ELR1.

DN 350×25-Sch80S 90ELR1.

Wn15(B)-25RF15300=8 δ=fF

PL 65(B)-10 RF n=4 D=175 b=3ampampampa=1

WN350-300 RF B=318

WN25(B)-63M/b=3 C=14 f1=3 WN450-150 RF S=10=

awn900-300rft20592-2009 20592)6/42-FHG/160tF1000 C=

WN100-150RFFk=320 bb=219 c=36 d=2/

WN200