Merge branch 'WJC' into temp-wxr

wxr

2021-06-23 7addb1dc6d80cc48c0478aa7ac9820363d4eebf6

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using System; 
namespace HDL_ON.Entity 
{ 
    public class AirCleaner  
    { 
        public AirCleaner() 
        { 
        } 
    } 
}