| http://www.w3.org/ns/prov#value | - In one aspect of the invention, a membrane of multi-layer construction includes one or more inner-layers, which serve as reservoirs for substances or agents such as biocides, lubricants, or indicators, which can pass through one or more permeable or semi-permeable outer layers to make the reservoir substance available on the outside of the membrane, or to alternatively prevent exterior transmissio
|
