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2021
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Invention
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Closing device for manholes or similar, in particular with closing cover with two or more leaves.... |
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2019
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Invention
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Closing device for wells or the like.
A closing device for wells or the like includes a frame th... |
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Invention
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Closing device for wells or the like. Closing device for wells or the like, comprising: • a frame... |
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2016
|
Invention
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Manhole comprising a device for safety closing and locking the manhole. A manhole includes a devi... |
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Invention
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Manhole comprising a device for safety closing and locking the manhole. A manhole (50) comprising... |
