Laparoscopic cholecystectomy is a new surgical technique. Compared with conventional surgery, LC has the characteristics of less trauma, shorter operation time, beautiful appearance, less postoperative pain, faster recovery and fewer complications, and is easily accepted by patients.

Letters of credit have grown rapidly. At present, LC (Letter of Credit) and D/P (cash against documents) supported by "Full-process Goods Right Pledge Credit Business" are widely used settlement methods in bulk commodity import.

The above sensor array of liquid crystal forms one side of a display component (such as a liquid crystal (LC) layer or an organic light emitting diode (OLED) layer), that is, the position where a pixel control switch (such as a TFT) of a display module is located.