San Francisco : Architect and Engineer, Inc · leaf 583
Treadlc Valve for Surgeons Lavatory Non-hamir.eriny Treadle Valve drinker and obviate manualcontact, their installation isspecially desirable. The valve, however,should be so constructedtluit it responds to theslightest touch of the foot,all the working paits shouldbe confined to a small spaceand…
Architecture · Building
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