Vacuum forming and the scientific principle of the earthquake

Q: how do you do, now we explain this knowledge of the earth, the issue of the topic is, why the earthquake happens at night? A: the earthquake actually occur at any time, in fact tend to occur at night, because the external cause - — The result of the sun and the moon's gravity. We know that the sun and the moon's gravity can cause water fluctuation in 2 times in a day. At the same time, the sun and the moon's gravity parliament 'tide' phenomenon caused by the earth's crust, we usually just do not know it. According to the measurement, in spring, Beijing area about 40 cm can lift the earth's crust. If the interior of the earth in the inoculation in the process of earthquake, the local force close to the action of rock burst at a time when there was by the gravitational pull of the sun and the moon, so ready to old seismic energy will suddenly burst. Here, the sun and the moon's gravity will play the role of the fuse. Earthquake not only happen in the night, but also often happened in the before and after the lunar month, 15 or 16. Because of the lunar month, 15 or 16 is one of the largest when the sun and the moon gravity before and after. Q: well, thank you for your answer in front, so let's know the products of our website, in the case of vacuum forming this kind of industry, under the simple introduction, please. A: the main advantage of vacuum forming packaging is, save raw and auxiliary materials, light weight, convenient transportation and good seal performance, in line with the requirements of environmental protection green packaging; Any abnormity products, vacuum forming machine can packaging without additional buffer materials; Be transparent packaging products, beautiful appearance, easy to sales, and is suitable for mechanization and automation of packaging, is advantageous for the modern management, save manpower and improve efficiency. Vacuum forming products was conducted in plastic processing, its products are made of flat plastic plate material after heating to soften, with adsorbed on the surface of mould, vacuum cooling molding, vacuum forming products with widely it is mainly used in electronics, electrical appliances industry, food industry, hardware tools, cosmetics industry, toy industry, daily necessities, medicine, health care products, automotive, stationery, office accessories category of industry, etc.