Selection of specified materials

Full Title

Methods or installations for obtaining or collecting drinking water or tap water > from underground > Obtaining and confining water by means of wells > Component parts of wells > Well filters > of elements of special shape > Selection of specified materials

Classification Context

Section:

FIXED CONSTRUCTIONS

Class:

WATER SUPPLY; SEWERAGE

Subclass:

INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER