Screen tube (double-layer nested - sliding protective hole)

CN310014952SActive Publication Date: 2026-06-02HENAN POLYTECHNIC UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Designs(China)
Current Assignee / Owner
HENAN POLYTECHNIC UNIV
Filing Date
2025-11-14
Publication Date
2026-06-02

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Abstract

1. Name of the product in this design: Screen tube (double-layer nested - sliding protective hole). 2. Purpose of this design: for underground gas extraction in coal mines. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.
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