English: A wind instrument is a musical instrument that contains some type of resonator (usually a tube), in which a column of air is set into vibration by the player blowing into (or over) a mouthpiece set at or near the end of the resonator. The pitch of the vibration is determined by the length of the tube and by manual modifications of the effective length of the vibrating column of air.
Countertrade means exchanging goods or services which are paid for, in whole or part, with other goods or services, rather than with money. A monetary valuation can however be used in countertrade for accounting purposes. In dealings between sovereign states, the term bilateral trade is used.
The Ilyushin Il-112 (Russian: Ил-112) is a high-wing light military transport aircraft being developed by Ilyushin Aviation Complex (JSC IL) for air landing and airdrop of military air cargoes, equipment and personnel.The aircraft is newest of all historically Soviet-origin aircraft (as of July 2019), and being manufactured by Voronezh Aircraft Production Association in Voronezh.
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