A simple feeder for small birds can be done literally in minutes, using a tin can and a stick of wood or a suitable diameter of the branch.
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Riding on an air cushion
Engineers were led to the use of air cushion by numerous attempts to reduce the hydrodynamic resistance of ships. As early as the beginning of this century, Swedish engineer Gustav Laval...
RELIABLE STAND
To books on the shelf stood upright, their back so those are the footings of two scrap boards connected at a right angle, and a reinforcing cross member. However, on the polished surface...
