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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,...
STOOL STEPLADDER
The proposed design (it can be called a two-storey stool, stool-ladder) is very practical, simple to manufacture and may find use in the summer house and in the apartment. Stool...
