Merge branch 'WJC' into temp-wxr

wxr

2021-03-08 8e5ba5665861b29a4b8da0335c81d620aa891862

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