Joke Collection Website - News headlines - The principle of rolling billboard in basketball stadium
The principle of rolling billboard in basketball stadium
Hehe, there is a mistake. Change it.
Those billboards are usually made up of many "vertical bars". Each vertical bar has patterns, some are double-sided and some are three-sided of Mitsubishi model. All vertical bars are driven by a common motor. Every once in a while, rotating a certain angle is a pattern, and rotating a certain angle is another pattern!
- Previous article:How to use green enclosure in construction site
- Next article:Public Security Bureau slogan
- Related articles
- Built-in monitoring slogan
- Summary of the work of the comprehensive management staff in the comprehensive management center
- Affiliates of Poly Energy
- What are the excerpts from Children's Heart to the Party?
- How to distinguish between military industry and civilian industry during the Westernization Movement?
- Publicity copy of replanting green plants in property flower boxes?
- Middle school students' safety speech on preventing drowning
- Ten Practical Experiences of Volunteer Epidemic Prevention and Control in 2022
- A 500-word speech about campus environmental sanitation and civilized etiquette.
- Tell me who has a long history in Wulin.