HG/T 20592  法兰 PL 250(B)-16 RFSch 1��@RF@4 RchF S rf0-4.@Rhh

PL250(B)-16 RFSch 1��@RF@4 RchF S rf0-4.@Rhh

WN 80(B)-16 RF S=4

PL400(B)-6 RF@b40ï؟½da

WN250-150 FM Sch40 S=10

BL150-16RF4h

WN153-600RFÂquot

PL 20(B)-40 RF0

WN100-900 RJ S=4.5

B WN 32"-600 RF

3 RF500-6.4ampquotyun2.5 &ampamp;amp;amp;