In construction you often have to deal with the internal measurements. For example, to determine the distance between the form panels, the value of the window or doorway. A good assistant in such cases would be sliding ruler, made of tube and metal rod with applied risk. V. ANTIPIN
Recommend to read
REFRESH… FLASHLIGHT
If the flashlight is to strengthen the tin bracket with a motor from a child's toy, the axis of which is planted miniature celluloid propeller, and connect the motor to the battery of a...
MINI-CASE AT THERMOMETER
Mercury thermometer, as we know the fragile and the contained mercury is also very dangerous. So if there is no standard paper sheath for it that will help out a makeshift rubber tip....
