GB/T 12459  弯头 DN 250-Ⅱ-1290EL0 RFF S=1200rfF/F-1250 RF4B)-16 RF-

DN 250-Ⅱ-12 90EL0 RFF S=1200rfF/F-1250 RF4B)-16 RF-

BL500 -6RF�线1=7006/5�77.5S=-150 RF S B= RFerSm2600-1.6/1.73Frf s=5b)-25rf1ampam

HG/T20592 SO150(B)-10RF

wn80-300RF

WN 50(B)-16 RF S=3

wn250-160rf sch40f4R0.6h80S014

PL 150(B)-10 G5RJ Sch80SF�