Apparatus for controlling and testing an electric installation
Apparatus for controlling armature movements in an electromagnet
Apparatus for identifying the position of an element, in particu
Apparatus for monitoring and controlling liquid level
Apparatus for monitoring machine parts subject to wear
Apparatus to generate magnetism
Apparatus with a single input connectable to electrical energizi
Arrangement for emulating an H-type relay air valve which is uti
Arrangement for separating a control device from an AC mains sup
Asynchronous digital locking system
Automatic by-pass for television components
Automatic electricity control monitoring exit/entry device