A person types on a manual typewriter, advancing the page and starting a new line each time the bell rings.
A person is typing fast on a typewriter. A person moves through the page using a manual typewriter, and a bell rings each time the line is reset. A person types on a manual typewriter, advancing the page and starting a new line each time the bell rings. Someone is typing at a typewriter and the bell rings several times and each time the roller is shifted. Someone typing on a typewriter at a constant rate.