GB/T 12459  弯头 DN 80-490EL

DN 80-4 90EL

wn500-600rfs

2 FM 1200-1.0 δ1=6

PL 125(B)-10 RF

2t450-2.5R@aw0-b=3B=10ch╨ι

WN 20-2500 RJ Sc

1 RF 900-0.6

SO 450(B)-10 RF�เ S=2JRF.�5(h�

WN15B-40M

WN500(A)-40M S=1rfpa5F FM-h0@9=01ะ“ย13f09FhF S rf0-4Sch40um0(b)- f1=261.5d