Bike pedals used to put a metal screw cap to protect the bearings from contamination. Now, instead, use the plastic plugs, which are often lost. Rescue plastic or nylon tubes from medical bubbles. Such substitutes being kept quite steady.
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Offer to improve a closure for closing window frames: it a metal plate with a slot for fixing the "tongue" needs to be set obliquely, as shown in the figure. Now, if zakryvanii frame in...
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A fluid or oil is supplied to market in plastic canisters of different capacities. A worn or leaky thrown into the garbage. However, one can do some useful things — for example,...
