Merge branch 'wxr6' into wxr4

wxr

2021-07-05 1ee407dd57a7273ef6b686ac25a40d4199f5bce9

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