Plane mirror is a common optical element, which is widely used in aviation, satellite, laser, medical instruments and other fields. High-end applications include optical communication, lidar, optical lens and other fields. In terms of materials, the commo
Pure black sesame sauce is made from Chinese black sesame raw materials and finely milled using Chinese traditional stone milling technology.At the same time, black sesame has a certain therapeutic effect Contains minerals, there are many ancient Chinese
