These windows are used in public places such as hotels, schools, and hospitals where not all people can open and close windows. In this case, all windows are opened and closed by a master key (handle) accessible to the person in charge.
These windows are used in public places such as hotels, schools, and hospitals where not all people can open and close windows. In this case, all windows are opened and closed by a master key (handle) accessible to the person in charge.
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