"Are you actually going to show them how to operate the machine?"

And use your common sense when you operate the machine.

That ended the easy part of the day's work and got him used to operating the machine, something he hadn't done in over a year.

Do not operate fans or other machines which bring in air from outside.

"You are the brother who operated the machine and did not pass through to Hell."

The person operating the machine will monitor your heart rate and breathing as needed.

"Show me how to operate the great machine, and you can be my mechanic."

"Are they still operating machines, and if so, of what level complexity?"

Operating the machine requires about the same amount of training as running a word processor.

There was something about how to operate the machine, then this: 'Warning!