1. The filling and compaction of molecular sieve is done in a professional environment in a professional way. The density is greater and the efficiency is higher. 2. The design of process and structure is optimized, and the system can exert its maximum potential. Higher reliability 1. Adopt a special valve that is frequently switched over 1 million times without failure to ensure the system's Stable operation 2. The system design is more reasonable, and the equipment is safer and more reliable. More convenient to use 1. Nitrogen can be automatically recorded, which is convenient to find the working status at any working time. 2. The system runs fully automatically, and the whole process can be unattended.