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[Subject: Precision & Other Instruments]
Translated in 6 languages
[Subject: Photography & Photographs, Apparatus, Equipments, Materials]
Translated in 5 languages
[Subject: Inland Waterway & Ferry Transportation]
Translated in 4 languages
[Subject: General Technologies]
Translated in 2 languages
[Subject: Data Processing Computer Science]
[Subject: Housing & Household Equipment - Televison]
[Subject: Inventions & Patents]
[Subject: Housing & Household Equipment]
[Subject: Electricity & Electronics]
[Subject: Mechanics]