Water density structure for intelligent castle, characterized by this, comprehensive:a front handle comprising a front handle and a first end cover, both cylindrical, with the front handle having a first mounting space open at one end along the axial direction, the first end cover removable from the front handle and the first end cover The opening of the first mounting area is covered, as well as a watertight ring, with the inner ring surface of the watertight being elastically applied to the outer wall of the front handle,and the outer ring surface of the water seal is applied elastically to the inner wall area of the first final cover.
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