Abstract: In a slotted wall milling cutter for excavation work, the milling wheel arranged laterally of a bearing bracket, mounted in rotary manner in the latter and equipped over its circumferential surface with radially projecting milling teeth has at least one milling tooth pivotable at right angles to the circumferential direction. This fixture permits a complete working of the entire milling cross-section.

Abstract: In the case of a plug connection for drilling or boring tubes, rods and worms for earth boring equipment with a male part and a female part, with a radial coupling for torque transfer and with an axial coupling having in the overlap zone of the male and female parts a locking device which can be introduced into an annulus for transferring axial forces, it is provided that the locking device is constructed as a multilink chain, which essentially extends around the entire annulus and which is introduced through the female part into the annulus via a single opening. This device provides a plug connection, which has a very simple construction and after extremely rapid installation is suitable for transferring very high forces.