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Priority to SU2181057ApriorityCriticalpatent/SU560079A1/en
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Publication of SU560079A1publicationCriticalpatent/SU560079A1/en
тем, что, с целью упрощени технологии изготовлени , она выиолнена из листового материала , свернутого в трубку, причем закладна н замыкающа головки выполнены в виде гофр, а назы расположены неравномерно по окоужности и один из них сквозной.so that, in order to simplify the manufacturing technology, it is made of sheet material rolled up into a tube, with the insertion and closing heads made in the form of corrugations, and the so-called iris are unevenly spaced and one of them is through.