The IF instrument works based on the unique physiological effects of the IF current. It generates medium-frequency alternating current between 1 kHz and 100 kHz through electronic circuits, which can penetrate human skin and tissues and reach deeper parts. When the electric current acts on the human body, it will cause muscle contraction and relaxation, promote local blood circulation, accelerate the metabolism, and help to take away inflammatory factors and metabolic waste. At the same time, the medium frequency current can also stimulate nerve fibers, by regulating the excitability of the nerve, block the transmission of pain signals, so as to achieve the effect of analgesia. In some therapeutic modes, it can also promote the exchange of ions inside and outside the cell, enhance the permeability of the cell membrane, and facilitate the absorption of nutrients and tissue repair.

Ray diffraction machine is mainly used in powder, block or film sample phase qualitative, quantitative analysis, crystal structure analysis, material structure analysis, crystal orientation analysis, macroscopic stress or microscopic stress determination, grain size determination, crystallinity determination, etc. In addition to the conventional diffraction data scanning mode, the X-ray diffractometer can also support the transmission data scanning mode. The resolution of transmission mode is much higher than that of diffraction mode, which is suitable for structure analysis. The diffraction signal is strong, which is more suitable for routine laboratory phase identification. In addition, in the transmission mode, the powder sample can be in trace, suitable for data acquisition with relatively small sample size and does not meet the requirements of sample preparation in diffraction mode.