What does pulley mean?

Pulley is a popular water lifting facility in northern China, which is used to draw water from wells.

The pulley is composed of pulley head, bracket, well rope and bucket, which is a lifting device made by using the principle of axle. The function of the pulley is to make the well rope roll by rotating the pulley head, so as to lift the water in the bucket. This kind of facility was widely used in ancient times, and it was called "the baby's bed with hoist on the well", which means it is very convenient and practical.

In addition to pumping water from a well, the word pulley can also refer to a mechanical winch, which is used to lift heavy objects or adjust the transmission of power. Pulleys are widely used in some engineering and construction fields.

For example, when crossing a ditch, a flying bridge will be built with a hoist. Feiqiao is a bridge more than two feet long and about one and a half feet wide. Eight hoists are installed on it. Through the rotation of these hoists, the bridge is tightened by rings and cables, thus completing the ditch crossing project.

Pulley sentence making

Grandpa taught me to use pulleys, and I learned to draw water from a well.

The most distinctive building in this village is the ancient pulley well, which attracts many tourists every year.

In ancient times, windlasses were used to lift heavy objects and help people finish all kinds of work.

4. The principle of the winch is to rotate the winch head and use the axle to make the well rope roll to realize the function of lifting water.

I once saw a huge pulley in the farmland to improve the irrigation water for crops.

6. Every household in this small village has its own pulley, which is convenient for them to get water.

In ancient construction sites, workers used hoists to transport building materials to high places.

8. When I was a child, I liked to watch the pulley rotate, which was amazing.