Gratis dengan uji coba Ukiran kuno meriam Krupp 72 ton dari Pameran Düsseldorf 1880. Ensiklopedia Industri E. -O. Lami - 1875. Meriam Krupp 72 ton, ukiran kuno. Ukiran kuno meriam Krupp 72 ton dari Pameran Düsseldorf 1880. Ensiklopedia Industri E.-O. Lami - 1875
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