更经济的节能技术在发达国家曾经投入运用。
Cheaper energy conservation techniques have been put into operation the developed world.
批量生产并投入运用将产生巨大的经济效益和社会效益。
It can produce great economic and social (benefit) when put into batch production and operation.
此外，做完试验后，被试机车往往要尽快投入运用，而试验电缆的拆卸很费时，造成了铁路运输的浪费。
In addition, the test locomotive is often put into use as soon as possible after test, but the cables 'disassembly is very time-consuming, and results in a waste of rail transport.
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