g . 323 . — Box Valve Seat with square sides , arranged for twelve Valves for Air Pumps . india - rubber valve arrange - a , Box with twelve valves . b , India - rubber valve . rnents , can be placed upside C , Guards . d , Stud for guard . down , or at any angle that the free entrance and exit of… … possible , and the grated Space Fj . . . 324 . — Double Oblong Valve with Hexagonal equal to the length and Gräting for Air Pumps . . . - r - - . . a , Gräting , b , India - rubber valve . c , Guard . breadth of the hole m the dd , studs .
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