供应空气 meaning in Chinese

supply air

For 2 , 000 years , humans ? usually boys from a church congregation ? squeezed bellows by hand or feet to supply the air , until electric motors and blowers took over
长达2000年的时间，都是人类（通常是教堂信徒中的男孩）凭手脚鼓动风箱供应空气，直到马达和鼓风机问世后，情况才改观。
The devices aim at a 25 per cent reduction in the emission of particulate matters . in 20022003 , the department supported the government property agency s proposal of shortening the air conditioning hours and setting the indoor air temperature at 24
在二零零二至二零零三年度，本处支持政府产业署的建议，把入境事务大楼的供应空气调节时间缩短，并把室内温度设定在摄氏24度，以节约能源。