620 Engineering and allied operations
620.002 Miscellany
620.0028 Auxiliary techniques and procedures; apparatus, equipment, materials vi
620 Kỹ thuật và các hoạt động liên quan
620.002 Tài liệu hỗn hợp
620.0028 Kỹ thuật và quy trình phụ trợ; máy móc, thiết bị, vật liệu it
620 Ingegneria e attività affini
620.002 Miscellanea
620.0028 Tecniche e procedure ausiliarie; apparecchi, attrezzature, materiali en
620 Engineering and allied operations
620.002 Miscellany
620.0023 Engineering--vocational guidance de
620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
620.002 Verschiedenes
620.0023 Ingenieurwissenschaften—Berufsberatung
Dewey Decimal Classification
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