These first set of renovations were mainly mechanical ones in order for the building to keep up with the changing times.

In other words, they are increasingly controlled by electronic means rather than mechanical ones.

The only truly reliable parts in Ms. Peterson's production are the mechanical ones.

On most modern railways, colour light signals have largely replaced mechanical ones.

The mechanism of capacitive switches is very simple, compared to mechanical ones.

The 17-year-old hotel also converted electronic locks to mechanical ones in about 300 rooms.

Computer technology has transformed slot machines into video games with images of spinning reels rather than mechanical ones.

Times Square historians tend to agree that the best signs were the mechanical ones dating back to the 1930's and 1940's.

That has led critics to argue the systems are less secure than the mechanical ones they replaced.

Whatever skills I may have, mechanical ones are not among them.