Today's crude humanoid robots already use gears, pulleys and pistons to mimic the actions of muscles.

He was prone on one of the starship's standard apparatus benches, which used only springs or pistons to provide resistance.

The result was that the engines used different pistons.

Reciprocating compressors use pistons driven by a crankshaft.

He knew that his dispenser couldn't use pistons, and he wanted to avoid battery power, too.

Older units had reciprocating compressors, which used pistons to compress the fluid.

The ramps are positioned using hydraulic pistons.

There was also a tendency to use single-acting pistons.

The bridge deck was pushed out from each bank of the river during construction, using hydraulic pistons.

It used aluminum-alloy heads and cast-steel pistons.