Hello!
Kerry starts to gather her books, pens, and papers together before the instructor is done speaking. She looks at her watch in an obvious way when the instructor is looking in her direction. Kerry is using Regulators to communicate.
Answer:
sorry don't know bro
you are sending difficult answers
bi-focal eyeglasses, self-winding clock, parachutes, <span>the hot-air </span>balloon, <span>the </span>safety lock, steamboats, and <span>the </span><span>circular saw :)</span>
