They are, not surprisingly, hydraulically operated and certainly seem to work very well.

They were operated hydraulically, which I found to be worthy of note.

This is actually a system of two hydraulically operated ramps.

One of the hydraulically operated shores had just let go as they were trying to lock it in, that was all.

The barrier was hydraulically operated and could be erected in three seconds.

The brakes were by Girling, hydraulically operated, with 9 in.

Features included a hydraulically operated folding soft top and electric windows.

The entire load of ash was dumped through two hydraulically operated doors in only a few minutes.

His most impressive design was a gigantic hydraulically operated tail dock system.

In 1919, most of the 2369 lifts in the metropolitan area were hydraulically operated.