1 उपकरण डिजाइन . कय समस्या सर्किट भाग कय शामिल करत, प्रिंटिंग प्लेटफॉर्म कय स्थिर बिजली औ नाक .
2.Weather factors. Especially the climate of south is often wet. If there is thunderstorms, there will be more ions in the air, and the equipment is metal, so that it is very easy to lead to static electricity;



