The advent of casting technology for tubular blanks for systems heating served as an impetus for the search for new types of materials based on polypropylene. As a result, one of the most successfu...
Read MoreIn most heating schemes, it is shown that the entrance to the radiator is at the top of the radiator, and the exit is on the other side (like Leningrad from the bottom). But I saw another scheme - ...
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