GB/T 12459  弯头 DN 32-Ⅱ-590EL

DN 32-Ⅱ-5 90EL

PL 500(B)-10 RFf5 RF-0.66rfF40f10

LWN20-300 RF

WN 200(B)-16 RF S=4

pl25-10rf hgF Sch600-f

pl20(b)-10 rf d=58H40S

2 rf1300-1.0160 u�°0r50 RF S=600-

wn25-63 rf /u00c3/u0083/u00c2/u00af

WN 500-600 RF0 RFg/900 RF6W0-B)40 δ

pl20(b)-2