Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 169
^ 591. BIBB, with crank-moved valve open-ing against the pressure. … 592. DISC VALVE ANDGUARD.—The spherical guardis perforated to give quick reliefto the movement of the elasticdisc.
Mechanical movements
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