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Publication of NL6601386ApublicationCriticalpatent/NL6601386A/xx
F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
F16L5/00—Devices for use where pipes, cables or protective tubing pass through walls or partitions
E—FIXED CONSTRUCTIONS
E04—BUILDING
E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
E04F17/00—Vertical ducts; Channels, e.g. for drainage
E04F17/08—Vertical ducts; Channels, e.g. for drainage for receiving utility lines, e.g. cables, pipes