Hengshan Metal is a bearing material with the sintered wear resistance layer as the sliding surface and the metal back. The sintered layer is a special bronze alloy with uniformly dispersed sloid lubricants such as the graphite and PTFE.
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