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
The SNOWMOBILE? The AIRBOAT? AMPHIBIOUS!
Readers of "M-K" have already had the opportunity to meet with a student design Bureau Mari Polytechnic Institute (see No. 8, 1977). This team is many years engaged in the original...
MELTING FURNACE
The furnace is designed for metals with suitable melting temperature in a volume of 10 cm3. It is an electrical transformer, the secondary winding ends of which are closed with a...
