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1.Pass the test of industrial standard QB/T 2698
2.Pass the test of industrial standard JG/T268
3.Exit door or fire door must adopt the door closer without the hold function
4.It can be used on both left and right side door
5.Only for single-open,and suit for wooden door,metal door and frame door etc.
6.Standard color is silver gray,other color can be customized
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