Position fixing apparatus; radar apparatus; devices used to locate materials and objects enclosed in floors, ceilings, walls, roofing and other building structures

Electronic scanners for detecting and locating concealed materials such as pipes, wooden studs and wires in the walls, ceilings, roofs, and structures of buildings

Electronic scanners for detecting and locating concealed materials such as pipes and wires in the walls, ceilings, roofs and structures of buildings