73306182
Apr 1, 1981
Jan 18, 1983
Impermeable Lagoon-Type Storage and Holding Reservoirs for Solids and Liquids with Liner Made Up of Layers of Fabric and Clay Adapted for Soil Stabilization and Pollution Control
Nonmetallic Building Materialsthe Construction and Installation to the Order and Specification of Others of Impermeable Lagoon-Type Storage and Holding Reservoirs for the Purpose of Control and Stabilization of Soil and for the Control of Environmental Pollution of the Soil, Ground Surfaces and Underlying Earth and Water Surfaces
Computer and Scientific