METHOD FOR SMELLING OIL SLATE AND / OR OTHER SMELLABLE MATERIALS

Process for carbonization of oil shale and other carbonizable materials

Ultrasonic delay line

Binding agent mixture for the preparation of mineral slag-sand free material for retention wall and a process for preparation of this binding agent mixture

The present invention concerns a binding agent mixture for the preparation of mineral slag-sand free material for retention wall and a process for preparation of this binding agent mixture. The binding agent mixture of the present invention contains burned oil shale, cement clinker and lignosulphonate. Thus a fixing agent mixture is created through the present invention which needs no slag-sand while simultaneously the material for retention wall prepared using this binding agent mixture meets all necessary requirements.

Control circuit foran ultrasonic delay lin a colour television receiver

Control circuit foran ultrasonic delay lin a colour television receiver

Piezoelectric resonator arrangement

Piezoelectric resonator arrangement of monolithic design

Electromechanical filter arrangement

Piezoelectric resonator arrangement