HASEL stands for " hydraulically amplified self-healing electrostatic actuators."

HASEL 代表“液压放大自愈静电致动器” 。

With the Cat D11T Big Dozer, the hydraulically operated ladder quickly and easily extends and retracts, allowing access.

使用 Cat D11T 大型推土机， 液压操作的梯子可以快速、轻松地伸展和缩回，以便进行通行。

Every time the crane has to move, the second set, which is hydraulically retractable, is pulled out.

每次起重机需要移动时，第二组液压伸缩式起重机就会被拉出。

Two hydraulic motors power the crawlers via closed planetary gear units that run in oil baths and have spring-loaded, hydraulically released holding brakes.

两台液压马达通过封闭式行星齿轮装置为履带提供动力，行星齿轮装置在油浴中运行，并具有弹簧加载、液压释放的保持制动器。