A fixed screw compressor is a mechanical device that compresses gas into high pressure. Its main working principle is to compress the gas through two spiral rotating impellers and push it towards the outlet. Screw compressors have some important working principles

An oxygen concentrator is a device used to separate and purify oxygen from the air before outputting pure oxygen. Its working principle is to separate oxygen from other gases such as nitrogen in the air through physical and chemical means, and then output the separated pure oxygen through the output port.