Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filedfiledCritical
Priority to NL6514445ApriorityCriticalpatent/NL6514445A/xx
Publication of NL6514445ApublicationCriticalpatent/NL6514445A/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
F16L9/00—Rigid pipes
F16L9/08—Rigid pipes of concrete, cement, or asbestos cement, with or without reinforcement
E—FIXED CONSTRUCTIONS
E03—WATER SUPPLY; SEWERAGE
E03F—SEWERS; CESSPOOLS
E03F3/00—Sewer pipe-line systems
E03F3/04—Pipes or fittings specially adapted to sewers