HG/T 20592  法兰 WN 500-16 RF S=10���@RF@4u2.50Sc@4

WN 500-16 RF S=10���@RF@4u2.50Sc@4

TPB-2T-

BL2-40FMRJ ScF@P2@Fj@5@F Sc��datF8r6 FM15@4 rf 1JsRF@F00j130chSR

WN 16"-150 RF Sch40s

WN25-160rf5RFF F-2500rj�

WN50(A)-100 RJ=‚Â3000-0.25Fm)-16S0F6 R

pl50a-16rj1=1.0F

SO 2"-150 RF

WN