Abstract: A building board for interior construction selected from the group consisting of mineral fiber boards, gypsum fiber boards and cement boards and containing from 1 to 25% by weight of zeolites.

Abstract: The invention concerns a projectile-resistant partition construction realized as a stand comprising on both sides a single- or multilayer plating (11, 12) with cover plates (13 to 16) and a plurality of stands (17 to 19; 51 to 53) arranged between the plating (11, 12) provided on both sides, where the plating (11, 12) is held directly or indirectly on the stands (17 to 19; 51 to 53), where furthermore bombardment plates (21 to 24) form an extensive projectile barrier (25) in the interior region of the partition construction, and where the bombardment plates (21 to 24) consist at least partly of plaster fiber materials.

Abstract: A method for cleaning pipes of a heat exchanger includes placing a throttle-free jet nozzle against an end of a pipe. The throttle-free jet nozzle has an outlet opening of a same size or slightly smaller than an inner cross-sectional area of the pipe. A stream of air containing an abrasive is blown through the pipe for cleaning the pipe.

Abstract: A gypsum-based building material containing from 1 to 25% by weight of zeolites.

Abstract: An adjusting ring includes a surface which is matched to the pitch of the winding wire. This adjusting ring is used in a device having a coil winding. As such, the coil winding can be positioned in its axial direction.