| 摘要 |
The device according to the invention comprises a cylinder 1, a piston 2 mounted slidably in the cylinder 1, elastic means 19, a reflecting element 9 carried by the piston 2, a light source 12 whose light beam 14 is capable of being reflected by the reflecting element 9 towards the receiving member 13 through a window 16, the said receiving member 13 being connected to an acoustic and/or visual warning device. Application, especially to monitoring the pressure of vehicle tyres. <IMAGE>
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