What is the difference between a ball bearing and a roller bearing?

What is the difference between a ball bearing and a roller bearing?

In our daily life, we can see many bearings in mechanic devices. You may want to know what is the difference between ball bearings and roller bearings....
Japanese Medical Institutions Have Scarce Epidemic Prevention Materials, And High Alcohol Is Used As A Disinfectant Replacement

Japanese Medical Institutions Have Scarce Epidemic Prevention Materials, And High Alcohol Is Used As A Disinfectant Replacement

With the continuous spread of new coronary pneumonia epidemic in Japan, the shortage of first-line protective equipment in medical institutions has become increasingly dan...
What is a blowing agent

What is a blowing agent

Whether it is our daily life or industrial production, a large number of various foam products are used. The use of these foam products can achieve the purposes of heat in...