HG/T 20592  法兰 WN 300(B)-10 FM δ=34

WN300(B)-10FM δ=34

TH 50(B)-160 RF

BWN800-150RFB=798.3

BWN750(B)-150RF0-0.RB)-150RFxsrf1

bl80-900 rj05 RF S2

WN 14"-300 RF

BL 40-900 RF

PL300-16RF

47065.4 A32000 PL RF

LWN 1 1/2"-300 RF0-10FFFBL5098.3 RF؟½ Sch8000-160 RJ156320 hRch4400