Merge branch 'CJL' into temp-wxr

wxr

2021-04-01 0c0a436a30bc24d4cd470eea7ba980ee418018ff

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