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.

When in the flying position, the wings were hydraulically locked.

It reopened in 2002, and is once more hydraulically powered.

At other times, the hydraulically assisted steering on the bridge is used.

This is actually a system of two hydraulically operated ramps.

Sports car tops do not come down hydraulically at the touch of a button.

The security in question involves vehicle barriers that could be quickly raised hydraulically.

In the Netherlands, over 200 wells have so far been hydraulically fractured.

The gun was hydraulically worked, but the ammunition parties had to use muscle power.

It features a first of its kind hydraulically retractable roof.

The saw is hydraulically powered, rather than using the 2-stroke engine of a portable version.

The landing gear are hydraulically raised with a manual pump.

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

The mine detector arms can be hydraulically articulated to their operating position in under three minutes.

This chamber is then sealed by doors at each end, which are lowered hydraulically.

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

The radiator cooling fans were hydraulically driven under computer control.

Once the quarry faces have been cut, the stone is gently displaced hydraulically.

This form of transportation is therefore completely hydraulically driven, requiring no outside energy source.

In some cases this visor is hydraulically controlled during dredging.

Transmission is hydraulically controlled, used on front wheel drive vehicles with a small engine.

As the dam was hydraulically filled, construction started on the spillway to its north side.

Mechanical signals may be operated by electric motors or hydraulically.

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