. . . . . "\\(\\eta\\)"^^ . "efici\u00EAncia"@pt . "rendimiento"@es . "efficienza"@it . "Efficiency is the ratio of output power to input power." . . "\\(\\eta = \\frac{P_{out}}{P_{in}}\\), where \\(P_{out}\\) is the output power and \\(P_{in}\\) is the input power."^^ . "efficiency"@en . "\u043A\u043E\u044D\u0444\u0444\u0438\u0446\u0438\u0435\u043D\u0442 \u043F\u043E\u043B\u0435\u0437\u043D\u043E\u0433\u043E \u0434\u0435\u0439\u0441\u0442\u0432\u0438\u044F"@ru . . . . . "http://en.wikipedia.org/wiki/Deformation_(mechanics)"^^ . "\u52B9\u7387"@ja . "http://www.iso.org/iso/catalogue_detail?csnumber=31889"^^ . . "Wirkungsgrad"@de . . . . "sprawno\u015B\u0107"@pl . "\u0643\u0641\u0627\u0621\u0629"@ar . "rendimento"@it . . "rendement"@fr . "\u6548\u7387"@zh .