GB/T 12459  弯头 DN 100-Ⅱ-890ES7h40-600 R

DN 100-Ⅱ-8 90ES7h40-600 R

法兰wn25(b)-63 rf(

PL25(B)-40 RF0cRj0G/

hg=t20592-2009 pl50(b)-10 rfF10δ=0/@47020 R=916

2 c-fm900-1.6

BL 250-16 RF5.1 f1=1.4 undefined=63.5â´1=100

NB/T47023 FM900-4.02300-2.5R0rjF50

bl125-160t3f░п©Б∙║�

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