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WebVoid Fill Foam for Abandoned Pipes, Mine Shafts & Other Large Voids. One of the most resilient void fill foams, AP Fill 420 is a two-component, high expansion, hydro insensitive polyurethane foam. It’s the top slab solution for polyurethane void fill. AP Fill 420 weighs 1.8 to 2.2 pounds per cubic foot. WebDesigned for field or lab use, the Geotech Geopump Peristaltic Pumps offer single-stage pressure or vacuum pumping of liquids to depths of 27 feet (at sea level). They are ideally suited for sample removal from shallow wells … domain hunter pro插件

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