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
“BOUZOUKI” IN “DIPLOMAT”
Modern models of air fight as a championship class and "Junior" are in many respects similar in construction and, accordingly, on the concept. They completely satisfy the "fighters"...
HYDRAULIC… CLASS
Imagine you are in class technical schools. Class is in session. Lecturer for the Department sets the course, and the students, as expected, sitting at desks and listening attentively....
