Always see during winter time old lady with difficulty dragged through the snow their shopping carts with products, and wheel trucks get stuck in the snow.
I propose by analogy with the runners for baby carriages made of metal of area a small slider, and to them fastened a tin box that tightly would include truck wheel. Length of slider — 200 mm below the removed they were placed at the bottom of the cart bag.
Recommend to read
TILE — KEY!
To make cutting tile easy method "cleavage", using a common wrench size for the nut which is 1...3 mm greater than the thickness of the tile. To speed the lower edge portion of the key...
“E-COLI”
Instead of bulky and uncomfortable electrostatic machines Wimshurst, coils Ruhmkorff in high school physics classrooms are increasingly high voltage converters voltage. They can be used...
