HG/T 20592  法兰 JWN 50×80(B)-63 RF S=5)RFB8B)

JWN 50×80(B)-63 RF S=5)RFB8B)

WN 300-150 RF43æ—&nbspæS/L500(B sJer0623(b)f4sga5/50-56g6(F62mchAfS=1

WN 150(B)-16 RF S=5.5�´=1L0-1 RF

PL200-10FFҖ� b=ch40sM10000sRF

A 20001b=5 d.6/k=m00b/516RF=4.53-1

WN300-150 RF S=16

wn50-900 m0250-25R1