亚洲国产高清视频_影音先锋中文字幕资源_91在线|porny|欧美_最近中文字幕视频完整

 In the process of using the atomic ash, we need to pay attention to many things, to avoid the local overheating of the atomic ash coating. Because the construction environment temperature is too low or the customer's requirements are urgent, many construction personnel use ultraviolet lamp auxiliary heating and other methods to improve the drying speed of atomic ash, so as to shorten the construction period. It is not too bad to do so, but we must pay attention to the local overheating phenomenon. Because the insoluble and immiscible material after the hardening of atomic ash is a bad conductor of heat, the local high temperature will change the expansion coefficient and internal structure of the coating, resulting in foaming and other adverse consequences. It has been proved that the baking temperature should not exceed 80 ℃.