Construction and mounting the nail dowel for fixing metal structures to concrete made from hardened steel. If you release hardened on the fire and sharpen the head a certain way, and then tempering it — get a perfect tool to the drill for figured wood and soft metals. L. MOROZOV, G. Samara
Recommend to read
YOUR BEST SCREW
Unfortunately, experience manufacturing propellers for the Amateur designs with rare exceptions not worth repeating. And perhaps the main cause of failures in the inconsistency of the...
TRICYCLE “GRASSHOPPER”
The “Grasshopper” tricycle was designed and manufactured in the small-sized equipment design laboratory of the KYUT of the Novosibirsk academic campus by seventh-graders Anatoly Mikhailov,...
