Door and window hinges (upper hinge, lower hinge)

Abstract

1. The name of the product of this design: door and window hinge (upper hinge and lower hinge). 2. Purpose of this design product: Hinges for doors and windows, connecting the door leaf and door frame and allowing the two to move or rotate in a certain direction. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photograph that best illustrates the key points of the design: Kit 1 stereogram 1. 5. Other situations that require explanation Other explanations: Kit 1 is the lower hinge, and Kit 2 is the upper hinge.

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