GB/T 12459  弯头 DN 15-Ⅱ-290EL

DN 15-Ⅱ-2 90EL

WN80B-16rf3-8 S=4-06r5

WN 200(B)-63 FF(b5 Ca)-п╠�5

WN 20-100 RJ SCH160

WN50-300FM SCH10S2.2-1.RF250 RF/

PL 400-10 FF16.5/50-1

pl200(B)-6fft/10F600-16/ RF SCH402.5f)-10RF030-8RF-

3 CFM 600-0.2520δ0=80

2 CT 650-4.020δ1=6

WN 20