2025-01-07 11:48:31
Metrology is an activity that achieves unified units and accurate and reliable values. It is a basic technology related to the development of the national economy and society. As an important part of metrology work, quality metrology is an important link in industrial production and is of great significance for ensuring product quality and improving production efficiency. General Secretary Xi Jinp...
2025-01-07 11:27:19
A, moment balance, statically indeterminate system Gravity weighing system and most commonly used weighing apparatus. In addition to a very few weighing devices such as hanging scales, the gravity of the measured object and the devices used to measure the force, such as sensors, their forces are parallel to each other, rather than co-point forces, so the mathematical equation of force measurement ...
2025-01-07 11:09:43
I. Concepts of Explosion and Explosive Environments An explosion is the sudden transformation of a substance from one state to another through physical or chemical changes, releasing a huge amount of energy. The rapid release of energy will cause violent impact and damage to surrounding objects. Three conditions must be met for an explosion (commonly known as the "explosion triangle", see Figure 1...
