working conditions through government control of the means of production.

This effect is used to advantage to change the state of the means for detecting (20) in response to preselected vibration of the sensor (10).

The state of the tyres is indicated by display means, according to the signal of the evaluation means.

The active state of the exchange means is sensed by means (111) activating the means (112) for reading the memory (113).

The device includes remote control means for driving the retaining means from the retaining state to the release state and conversely.

Manually releasable catch means [12] hold the biasing means in the loaded condition.

The operation information acquisition unit (103) acquires operation information on an operational state of public transportation facilities.

Movable means (31) support the platform in the extended position.

The device according to the invention comprises control means (4) for keeping the first means (301) in the passive state and the second means (310) in the active state following a cold start.

The invention relates to means for inspecting rail track conditions.

Provided is a means for assessing the state of the oral cavity of a subject.

The invention relates to means for controlling rail track conditions.

This monitoring arrangement includes means for indicating the status of the D channel signals to a user.

The invention provides an interface element (1) adapted to interface with a communications network (7), the element comprising monitor means (4) to monitor the state of the network, and a method of using the interface element.

The State may create media of social communication.