In the practice of the house master often there are cases associated with loosening or tightening of screws of large diameter. Without the “powerful” screwdriver not to do. Equip her with a pen, as shown and work with it will be much easier.
Recommend to read
Portable Power Station
I propose a design for a gasoline-electric unit (GEU) "Firefly", designed for charging batteries, powering lighting lamps and other DC consumers at 12 V.
I developed this unit three...
ON THE EVE OF PEARL HARBOR
By the end of the First world war the Navy of the United States of America was large, but very strange composition: a significant linear force, the almost complete lack of any modern...
