Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Юлия Николаевна Степанюк, Константин Александрович ГатиловfiledCriticalЮлия Николаевна Степанюк
Priority to UAU201002743UpriorityCriticalpatent/UA53398U/en
Publication of UA53398UpublicationCriticalpatent/UA53398U/en
A filter, in which tube elements with holes are installed into perforated tubes with possibility of changing position of the tube elements relative to the perforated tubes.
Improvements made to the structural design of a message-conveying device, with the provision of a through-compartment for one medium to be replaced by the insertion of another, or the provision of a cut-out