Classification Information
SEALING AND LINING PIPES, GULLIES AND SEWERS; INSERTING FLEXIBLE TUBES OF PLASTIC MATERIAL IN PIPES, GULLIES AND SEWERS; GROUTING CIRCULAR SPACES IN PIPES, GULLIES AND SEWERS; CONNECTING PIPES AND SEWERS TO GULLIES AND SIDE PIPES, CLEARING AND CLEANING PIPES, GULLIES AND SEWERS
Building Construction and RepairINSPECTING AND EXECUTING AIR AND WATER-TIGHTNESS TESTS ON PIPES, GULLIES AND SEWERS
Computer and Scientific