Accra, Ghana Girls Vocational Training Institute, a vocational school in which African girls are trained in electrical engineering. Here a student...
Accra, Ghana Girls Vocational Training Institute, a vocational school in which African girls are trained in electrical engineering. Here, a student...
Accra, Ghana Girls Vocational Training Institute, a vocational school in which African girls are trained in electrical engineering. Here, a student...開朗, 非洲 - 地理位置, 非洲人
Accra, Ghana Girls Vocational Training Institute, a vocational school in which African girls are trained in electrical engineering. Here, two...迦納, 技術, 發展中國家
Accra, Ghana Girls Vocational Training Institute, a vocational school in which African girls are trained in electrical engineering. Here, a student...技術, 教育, 學習
Accra, Ghana Girls Vocational Training Institute, a vocational school in which African girls are trained in electrical engineering. Here, a student...迦納
Accra, Ghana Girls Vocational Training Institute, a vocational school in which African girls are trained in electrical engineering. Here, a student...技術, 非洲 - 地理位置
Plotting of a curve of the difference of potential between a conduct of gas and a next soil. France, 1914. BOY 6868.
Fast measure, with the help of an ordinary voltmeter, of the difference of potential between a conduct of gas and a rail of tram. France, 1914. BOY...
Linemen use a portable General Electric voltmeter as they take readings from Cleveland Electric Illuminating Company's power distribution lines.
