A suspension system using a liquid to transfer suspension movements to pneumatic (gas) springs.

Instrument used for measuring relative humidity - in an automotive context it is used to check moisture content of brake fluid.

A paint film or other solid that readily absorbs water.

Bevel gear with the axes of the driving and driven shafts at right angles, but not in the same plane, giving some sliding action between teeth. Widely used in rear axle final drives.

A characteristic of materials, sensors and sometimes instruments to make their behaviour dependent on the immediate history to which they have been subjected. Typically the final settling point is different when approached from above to when it is approached from below