Fasten on the side of its walls pieces of rubber hose — doors of your car are always safe.
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For a uniform bending of the tubing, especially thin-walled, usually filled with sand. But it may happen that at the right moment it will not be on hand. In this case, it is possible to...
MEET DISCS
In the old days, when required to perform switching in the electric circuits when the voltage rises to a certain threshold, resorted to the use of polarized electromagnetic relay....
