GB/T 12459  弯头 DN 800-1245ELRFRF1540S RF)-10

DN 800-12 45ELRFRF1540S RF)-10

wn50(b)-63rf5-ฮดi

So150(B)-16RF S=8

WN12"-300 RF B=303.9

BL500-10 RFfร�1.0hฝ@4R

WN20-300M-40 RF S=3

PL 200(B)-16 RFM0S6 RFF Sch40S0 RFRJSrf0

WN40-150 RF Sch40m=h404-

so25 -16rfFMs hg½Ã�

1 RF 450