Door and window double pulley block

Abstract

1. The name of this design product: double-row pulley block for doors and windows. 2. Purpose of this design product: used as door and window system accessories to assist doors and windows in sliding. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture. 5. The rear view is the same as the front view, so the rear view is omitted. 6. Description of other situations that need explanation: The enlarged view of part A is the enlarged view of part A in the main view; the enlarged view of part B is the enlarged view of part B in the top view; the enlarged view of part C is the enlarged view of part C in the bottom view. 7. Other circumstances that require explanation: This design is a product of indefinite length.

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