Abstract: The invention relates to a plug connector (10), in particular, for telecommunications and data-systems-technology connections, comprising a housing in which a connector jack (20) is disposed around which a mating face is disposed, wherein the housing has a front section (44a, 44b, 44c, 44d, 44e) and a rear section (42), wherein the mating face (30a, 30b, 30c, 30d, 30e) is disposed on the front section (44a, 44b, 44c, 44d, 44e), while the connector jack (20) is disposed in the rear section (42) or in the front section (44a, 44b, 44c, 44d, 44e), and wherein the front section (44a, 44b, 44c, 44d, 44e) is disposed on the rear section (42) in a detachably connectable manner.

Abstract: In a unit of a piston and a piston rod, a piston and a piston rod are connected with each other in a gas-proof manner. To this end, the piston has a closed bottom and a blind hole, into which a sleeve-shaped section of the piston rod is pushed. By means of a force being applied between the piston and the piston rod, the sleeve-shaped section is provided with a bulging which projects into an annular groove of the blind hole. This serves to attain a connection of the piston and the piston rod by form locking.

Abstract: A dry-operating electrostatic precipitator, especially for the cleaning of steel-making converter gases in which pyrophoric dust may deposit on electrodes of the electrostatic precipitator, has these electrodes composed of structural steel clad with corrosion-resistant steel.