| 摘要 |
Clogging indicator for a filter, including a magnet (39) attached on the head (30) of the piston (28) and movable with respect to the latter as a function of the antagonistic forces of two springs, one (35) made of Shaped Memory Alloy (SMA) being stiff above a defined temperature and flexible below, the other (40) made of conventional alloy having a force less than that of the spring (35) when hot but greater than that of the same spring (35) when cold. Application to aircraft. <IMAGE>
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