Balance beam e telescope: o que têm em comum

1. Passo 1. Balance beam — faz parte de — Shaduf. A long pole acting as a lever.
2. Passo 2. Shaduf — utiliza — Lever. A shaduf is a lever with a counterweight.
3. Passo 3. Lever — é utilizado em — Optical telegraph. The arms were moved by a system of levers and rods.
4. Passo 4. Optical telegraph — utiliza — Telescope. Signals were read through a telescope.

Abrir Evothings