With very good air-tightness, can conduct reaction under negative pressure and easily assemble distillation, reflow device.

有很好的气密性可在负压下反应方便地组装成蒸馏回流装置。

youdao

Under negative pressure, nickel sulfate can be recovered from the liquid waste of copper electrolysis through the boiler stream. The recovery rate of nickel sulfate comes up to 98 %.

在负压的条件下，利用锅炉蒸汽回收铜电解废液中的硫酸镍，其回收率达到98%以上。

youdao

Security: Our equipments have ant-blocking device, also have pressure gauges, alarms, safety valves and vacuum equipment. Normal operation are going on under negative pressure or ordinary pressure.

答：(1)安全：我们的设备有防堵塞装置，还配有压力表、报警器、安全阀、负压设备，正常运行都是负压或常压下工作。

youdao

It was a nasty looking place, but the building is under negative air pressure to prevent the stink from escaping.

FORBES: How To Burn Trash For Power

If there is to be political strife in Indonesia though, the market will be under pressure and the impact on Asia will be negative.

CNN: ASIANOW - Asiaweek