NB/T 47021  法兰 RF 1700-1.0 ff.229Sch2R.5R∙A/S.0/70015/u0020615

47021 RF1700-1.00 ff.229Sch2R.5R∙A/S.0/70015/u0020615

WN15-2500 FM43-561.S0 Hd=f0rmpa=

3 RF 400-2.56 rf 500476

BI 2600 δ4

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WN3"-150 RFï؟½-N450-155S

Bl50-25rf

So600b-16rfB)-16 RF0.6

WN300