Stretch spring:

Stretching springs can absorb and store energy and produce a reaction force against tension. Both ends of the stretch spring can be fixed to other components. After the components are separated by an external force, the stretching spring exerts a force that returns all the components to their original position again. When these components come apart, a stretch spring tries to put them back together. Stretching springs absorb and store energy and create resistance to tension. The initial tension determines how tightly the stretch spring is coiled together. The initial tension is controlled to meet the load requirements of a particular application. Stretch springs have hooks, holes, or other interface geometry at the end for attaching components. They often provide resilience to components when the starting position is stretched.

Network optimization materials:

The manchu printing equipment of the barometer should not touch the internal parts without destroying the manchu printing.

The barometer is in the working part, in the absence of pressure or empty space, before the verification of the transformer measurement and after the verification of the blood pressure reduction measurement, the precision high temperature resistance spring hand zero deviation should comply with the following provisions:

For a barometer with a zero limit nail, the needle should be pressed against the limit nail. The "indentation" must not exceed the square root of the larger allowable base deviation.

The barometer and negative pressure gauge without zero limit nails shall be in the total width of the zero measuring range line. The total width of zero measuring range line of precision high temperature resistant mold spring shall not exceed two times of the square root of larger allowable foundation deviation.

The level of the barometer and the large allowable base deviation shall meet the requirements.

The barometer and return error shall not exceed the square root of the larger allowable base deviation.

After the barometer taps the watch case strap, the change in the measuring range of the watch hand cannot exceed 1/2 of the square root of the larger allowable base deviation.

The movement of the barometer needle should be stable in the full range of measurement, without tremor or stuck.