Protective device and construction equipment
The utility model discloses a protection device and construction equipment, relates to the technical field of building protection, and aims to solve the problem that two ladder sections positioned above a ladder beam have larger height difference with a construction surface above the ladder beam at...
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Hauptverfasser: | , , , , , , , , , , , , |
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Format: | Patent |
Sprache: | chi ; eng |
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