The good technical effect is as follows: low cost, high efficiency, simple site;

本发明有益的技术效果在于：成本低廉、效率高、场地简单；

youdao

The good technical effect is as follows: low cost, high efficiency, simple site;

本发明有益的技术效果在于：成本低廉、效率高、场地简单；

youdao