Echo sounder ЭМ-52, Certificate, specification, operating instructions
Т27 Г-6/55 английский/Echo sounder ЭМ-52 : Certificate, specification, operating instructions.Echo sounder ЭМ-52 : Certificate, specification, operating instructions.Echo sounder ЭМ-52 : Certificate, specification, operating instructions.M./, 1960 ( ). - 1960. - 35 с. : черт. ; 22 см см. - ("Neftepribor" works / Soviet narodnogo khoziaystva. Moskovsky (gorodskoy) ekonomichesky raiyon).Echo sounder ЭМ-52 : Certificate, specification, operating instructions. M., 1960 .Тг-1116/