Never crack open a hydrogen cylinder to clear the valve of dust, as the escaping hydrogen may ignite.

由于溢出的氢可能着火，禁止啪地一声打开氢钢瓶。

youdao

Phantom Eye has a 150-foot wingspan and is powered by two 2.3-liter, four-cylinder hydrogen engines that each provide 150 horsepower.

“幻影眼”无人机拥有150英尺的翼展，由两个2.3升四缸氢燃料发动机提供动力，每个发动机提供150马力的动力。

youdao

The invention discloses a hydrogen engine, which comprises: a cylinder and a hydrogen fuel feeding system.

本发明公开了一种氢气发动机，包括气缸和氢燃料供给系统。

youdao

The fuel would be injected as two beams, which would spiral their way down the cylinder, with the hydrogen chasing the boron and colliding with it.

ECONOMIST: How to get an energy rush without doughnuts