Waterproof gaskets and seals for internal combustion engines, for pneumatic controls for machines, motors and engines, for hydraulic controls for machines, motors and engines, for hydraulic engines and motors, motors, electric, other than for land vehicles, for heat exchangers, for steam engine boilers, for engines for air cushion vehicles, for pneumatic tube conveyors, for taps, for springs, for pressure regulators, for pumps, for compressors and for hydropneumatic or hydraulic circuits, bei...