AMERATION
LEACHING FIELD CHAMBERS CONSISTING OF UNITARY MODULES HAVING INTERLOCKING ROOF PORTIONS SUPPORTED BY PEDESTALS FOR PLACEMENT ON THE SUB-SURFACE BED OF A LEACHING FIELD TO FORM A CLOSED ROOF OVER SAID FIELD AND THEREBY PROMOTE LATERAL AND LONGITUDINAL FLUID FLOW OVER THE SURFACE OF THE FIELD
Expired · September 26, 1968 · 72308264 ·
