|6055848||Air quality measuring device|
The present invention provides a device for measuring air quality. The device includes at least one sensor with a sensor resistance which is converted via signal processing into an output signal, the gas sensing or air content sensing device having its se...
|4935599||Air-conditioning device, especially for railroad cars|
The air-conditioning device, in particular for a railroad car (2), includes a fan (1) for blowing cold or heated air into a conduit (4), the upper portion of which opens into a space (7) delimited by two parallel walls (8, 9) which are adjacent to the lat...