For the wire and cable industry, the most obvious material substitution is to use aluminum conductors instead of copper conductors. When conducting the relative costs of copper and aluminum conductors, it is necessary to consider factors such as price, specifi…
The production process of the epitaxial wafer is very complicated. After the epitaxial wafer is finished, the next epitaxial wafer is randomly selected from nine points for testing. The products that meet the requirements are good products, and the others are defective produc…