Excimer laser is a cold laser with a wavelength of 193nm, which is directly ablation on the anterior corneal elastic layer under computer control to fundamentally change the curvature of the cornea, reshape the corneal radian, and achieve the treatment of myopia, farsightedness, astigmatism, presbyopia, corneal transplantation and other purposes. Because it is a cold laser, no damage to the tissues around the eyes, with a safe, painless, fast characteristics. Excimer laser surgery has six advantages, such as high accuracy, high safety, high stability, short operation time, good comfort and good operation effect. It is widely used in refractive therapy at present. Through unremitting efforts, Skywave Medical Company has successfully broken through the technical bottleneck of maintenance of Allegretto Excimer Core Components -- and realized the maintenance service of imported Laser Tube to fill the gap of domestic maintenance technology. Because the price of imported laser tube is very expensive, once the problem occurs, the most users can not afford to high replacement cost. The successful breakthrough of this technical bottleneck not only saves a lot of money for domestic users, but also greatly reduces the waiting time needed to replace the laser tube. Now we sincerely invite the prospective users and service companies with such needs to come to consult and negotiate.