The force measuring tool is called dynamometer

The tool for measuring the force is called a dynamometer. The spring dynamometer is an important measurement tool for measuring the force in the laboratory, and it is also an important test point for middle-test questions. Here's a discussion with the students about the use of spring d.......

The origin and status of vibration aging

Origin and application abroad
In the process of casting, welding, forging, machining, heat treatment, and straightening of the workpiece, residual stress occurs inside the workpiece, and the presence of residual stres.......

LED market competition intensifies the closure of lighting companies

Recently, the LED industry has heard that Shenzhen Lights Lighting owner Qiu Huarong has run away. The factory has been shut down on the 21st, owing nearly 400 employees three months salary totaling about 4 million yuan, and suppliers more than 20 million in payment. This is followed by the exp.......