Special design of air and hydraulic, enough air pressure, make the machine steady to use.

本机采用气、油压并行设计，空气压力足，下料稳定。

youdao

Air in system. If air gets into the hydraulic system, poor Braking and a spongy pedal will result.

空气进入系统：如果空气进入液压系统，就会产生制动不良和踩下踏板不能产生制动力。

youdao

Hydraulic reservoir at atmospheric pressure, with return line below fluid level and air filter.

带有回流管(低于流体水平面)和空气过滤器的液压容器。

youdao

The cells had hydraulic doors and air-conditioning.

NEWYORKER: The Black Sites

Environmentalists have loudly worried that hydraulic fracturing, or fracking, may threaten water and air, though the Obama administration and many state regulators say the practice is safe when done properly.

NPR: Northeast Drilling Boom Threatens Forest Wildlife

Today the Obama administration tightened oil and gas industry regulations, forcing drillers to capture air pollutants released during well construction including during hydraulic fracturing (fracking) in new wells.

FORBES: U.S. Energy Independence in 15 Years?