As we all know, no matter whether it is in working or storage state, military equipment will be affected by various kinds of water to varying degrees. Among them, the most common impact is rain. Some equipments are exposed to it although they have rain prevention measures. The effect of condensate or leakage on the surface. When it rains, due to the penetration, flow, impact and accumulation of rainwater, it will have various effects on military equipment and its materials. Such as heavy rain will interfere with the propagation of radar signals; heavy raindrops can erode the surface of high-speed flying aircraft and missiles; rainwater can penetrate into the equipment and destroy its structure and components. Therefore, the impact of rain on products cannot be ignored. The purpose of the rain test of military equipment is to determine the ability of these equipment to protect against the penetration of rainwater under rain conditions, and the performance of the equipment during or after rain. The box-type rain test box is mainly used to determine: the effectiveness of the protective cover or protective shell to prevent rain seepage; the ability of the equipment to meet its performance requirements during or after rain exposure; the physical damage of the equipment due to rain; the rainwater drainage system Is it valid? metal rolling tray; smoking tray; cigarette tray; hand-rolled tray; NANTONG OUFEIYA IMP& EXP CO.,LTD , https://www.zjnantongoufeiya.com