The nitrogen purging system provided pure nitrogen with proper humidity for the sealed display case in order to maintain anoxia environments, and monitors were used to monitor the experiment.

• 密闭展柜内充满氮气,维持缺氧环境,同时放置调湿剂和除氧剂,调湿剂用于调节展柜相对湿度,除氧剂用来吸收展柜内氧气;