HG/T 20592  法兰 PL 400-10 RF d=430 f1=4 R20 Sch2-

PL400(A)-10 RF d=430 f1=4 R20 Sch2-

WN 80(B)-25 RF S=7

wn50(b)-10 rf d=140 k=110450-

3 RF 600-1.6

3 RF 1500-2.50S300 LFM B=135h00VOch8BF0RFSCH

PL15-6 RF

BL400-600 RF

1 CRF 800-0.25 δs=10

WN 25(A)-16 RF

LWN 25-300 RF sch80f3ch05j-0RF SCH10S2RJ0/25Fm