GB/T 12459  弯头 DN 50-Sch40S90EL0 df12010(

DN 50-Sch40S 90EL0 df12010(

WN 15(B)-25 RF

WN 25(B)-160 FM S=0t

BI 2000

WN200(B)-16 FM H=82.5 C

PL 450B-16 RF��1BRF16000 R

WN 150(B)-25 RF S=9

PL20(b)-40rfSch603/-=1900S

WN 8"-1500RJ S=12.7

PL 50(B)-10 RF5 RFh40�F080JRF Ⅱ RJAfh80FM5@PFFt