Concrete prepared according to a proprietary formula for use in concrete floors

Building materials (non-metallic), non-metallic rigid pipes for building, asphalt, pitch and bitumen, non-metallic transportable buildings, monuments, not of metal

Ashtrays of non-precious metals

Building materials (non-metallic); non-metallic rigid pipes for building; asphalt, pitch and bitumen; non-metallic transportable buildings; monuments, not of metal

Compressors [machines]; dynamos; filters for cleaning cooling air, for engines; pumps [machines]; valves [parts of machines]; pneumatic controls for machines, motors and engines; aerocondensers; compressors for refrigerators; heat exchangers [parts of machines]; dust exhausting installations for cleaning purposes.