Do not you find that a bunch of keys in your pocket slizhkom became cumbersome? Solder them in pairs, and it will be much more compact and easier to use. The keys are connected to a pair of depending on the length and destination. Possible combinations can be the key to the apartment and from the mailbox; the key of the garden gate, and to give the key to the garage and from the castle at the gate.
Recommend to read
SWITCH WITH PROTECTION
In many technical constructions, devices, in laboratory and bench equipment, automobiles used a DC electrical supply voltage of 12 V overload protection, which can lead to spontaneous...
BOTTLE “CANTEEN”
In the frosty winter time it is difficult for small birds — no place to forage. They come to the rescue of young and old alike, arranging a variety of feeders. Here's a bird "dining...
