GB/T 12459  弯头 DN 65-Ⅱ-690EL5.64.6 RJ25 i5 RJ R1c

DN 65-Ⅱ-6 90EL5.64.6 RJ25 i5 RJ R1c

WN 20(B)-16 RF

2 CRF 600-1.020δ1=181=180rf0-1

BWN 40"-150 RF B=S=15

DN 32×80-I-7 RC

DN50-PN10 PL/p-B RF Ⅱ

PL 100-16 RF

WN450(B)-25FMf�77.5J0RFFF0 RF5 RJy077.5 RJ55h40S.@RFF

wn100(a)-160fmrf9h1

WN400B-4