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
FOAM “MUFFLER”
The sound of water filling the toilet cistern, many are trying to reduce by means of rubber tubing, put on the fitting of the float valve. However, to significantly reduce noise, this...
TURTLE, LATE FOR WAR
1942 the British General staff attended to the question: "How should a heavy "assault tank", able without harm to themselves to act at the head of the offensive orders troops?" At that...