Automatic protective guard for building doors and windows
The utility model discloses an automatic protective guard for building doors and windows. Side frame, a front frame is arranged in the middle of the front side of the side frame; a protective net is mounted in each front frame; a rotating rod b is installed at the bottom of the left side of the fron...
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Main Author | |
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Format | Patent |
Language | Chinese English |
Published |
19.11.2019
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Subjects | |
Online Access | Get full text |
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