Deep Groove Ball Bearing
Deep groove ball bearings.…
Deep groove ball bearings.…
According to data released by the Indian health department on March 23, the number of confirmed cases of new coronary pneumonia in India has risen to 433. The Indian Civil Aviation Authority announced on the 23rd that it would suspend the op…
What is Single-layer Graphene? Single-layer graphene consists of a single layer made of carbon atoms. The sp2 covalent link between each carbon atom makes single-layer graphene the stiffest and thinnest material in the universe (its fracture stren...…
The limit of the resolution of an optical microscope is about half of the visible wavelength, called the Abbe limit, which prevents us from understanding the microscopic world more deeply.…