On a country site the need potrebovat soil occurs often put whether the garden bed or greenhouse, do pave the path if arranged strip Foundation of concrete and rubble stone. Simple and convenient device for this will serve as a mini Baba from a wooden block and two attached to the cuttings.
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AN ASSISTANT ELECTRICIAN
The proposed instrument is an improved version of the previously published article "the Indicator of the electric field" [1]. An assistant electrician (NPE) is a relatively...
THE SOLENOID
So, you are already familiar with the electromagnet, knows how to work the buzzer and electric bell (see "M-K" No. 8 this year). But there is a large group of Electromechanical devices,...
