There are many ways to keep a ladder from slipping. The easiest “put on” her old sneakers or shoes with a rubber sole.
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IL-4 ELECTRO
This unusual model was built by members of syt Berezniki, Perm region. Copy flies perfectly, performs such demonstrations as "flying under the 45° angle" and "pipeline." Remote speed...
GUIDE MACHINE
In school museums or at exhibitions of young artists in the role of a tour guide may carry a tape recorder. Explanatory text in advance is recorded on a magnetic tape. It remains only to...
