In the distance, there is the air compressor. All valves in this system are pneumatically operated with quick opening and closing.

远处为空气压缩机，系统内所有自动阀均为气动，开关迅速。

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Some machines coming with air cooling or water cooling system can be operated for longtime.

部分机型备有冷风或水冷系统方便长时间运作。

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Its elevation system is operated by linearity electric motor. Others adjustment operated by air spring and manual. It is a kind of electric and air spring double-action operating table.

升降系统为线性电机操作，其他动作为气压弹簧和手动操作，是电动和气动双动力的综合外科手术台。

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Take the chaos that has engulfed Brazil's airports for the past six months, the result of a creaking air-traffic control system operated by disgruntled air-force staff.

ECONOMIST: Brazil: Lula opts for a quiet life | The