GB/T 12459  偏心异径管 DN 200×100-3REschf21.@

DN 200×100-3 REschf21.@

BL 700-10 RF

bl450(a)-10 rf-1p RFch10 h1=91200/0 RF ScF1600δ000(B

bl400(b)-6 rf60 RF( RJ RFpaF

WN100-10RF d=1570=RF S

WN50-63RF S=30RF/40s0300 rf2059

WN65b-16 RF

WN65-16 RF

WN 65-150 RF

JWN 80×125-300 RF RJF48 BF.5 RF SCH12