Ceramic round plate made of 99% alumina, is mainly used as wafer processing substrate in the semiconductor industry with existing diameter: 240mm, 260mm. 360mm. 485mm etc. Ceramic conical tube made of 99% alumina, is used in paper making industry. Ceramic
Astragalus (Huang Qi) is a plant native to Asia. The Chinese name of the herb, huang qi, means "yellow leader", because the root is yellow and it is considered to be one of the most important herbs in traditional Chinese medicine. The part of the plant us