621.38 Electronics, communications engineering
621.384 Radio and radar
621.384028 Auxiliary techniques and procedures; apparatus, equipment, materials 621.384092 Radio engineers 621.3841 Amateur radio (Ham radio) 621.3845 Radiotelephony 621.3848 Radar vi
621.38 Điện tử, kỹ thuật truyền thông
621.384 Vô tuyến điện và rađa
621.384028 Kỹ thuật và quy trình phụ trợ; máy móc, thiết bị, vật liệu 621.384092 Kỹ sư vô tuyến điện 621.3841 Vô tuyến điện nghiệp dư 621.3845 Điện thoại vô tuyến 621.3848 Rađa it
621.38 Ingegneria elettronica, delle comunicazioni
621.384 Radio e radar
621.384028 Tecniche e procedure ausiliarie; apparecchi, attrezzature, materiali 621.384092 Radiotecnici 621.3841 Radiofonia amatoriale (Stazioni di radioamatori) 621.3845 Radiotelefonia 621.3848 Radar en
621.38 Electronics, communications engineering
621.384 Radio and radar
621.3840285572 Radio--engineering--data representation 621.3840288 Maintenance and repair 621.384092 Radio engineers 621.3841 Specific topics in general radio 621.3842 Radiotelegraphy 621.3845 Radiotelephony 621.3848 Radar de
621.38 Elektronik, Kommunikationstechnik
621.384 Funk und Radar
621.3840285572 Funk--Technik--Datenrepräsentation 621.3840288 Instandhaltung und Reparatur 621.384092 Funktechniker, . . . 621.3841 Einzelne Themen zu Funk 621.3842 Funktelegrafie 621.3845 Funkfernsprechtechnik 621.3848 Radar
Dewey Decimal Classification
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