"View of the west abutment showing the concrete plant, placing trestles, and suspension bridge carrying the aggregate... - NARA - 294144.jpg
en
"View of the west abutment showing the concrete plant, placing trestles, and suspension bridge carrying the aggregate... NARA 294144, Construction aggregate, Construction of the Grand Coulee Dam, US National Archives series: Photograph albums, compiled 1903 - 1972, Images from the National Archives and Records Administration, US National Archives location: other, "View of the west abutment showing the concrete plant, placing trestles, and suspension bridge carrying the aggregate conveyor."
commons
ja
「コンクリート工場の西側のみ、ゴミ置き場、骨材を積んだ吊り橋の様子。」NARA 294144、総工費、グランドクーリーダムの建設、米国国立公文書館シリーズ:写真アルバム、1903-1972年、米国国立公文書記録管理局画像、米国国立公文書館所在地:「コンクリートプラントを示す西側のの図。骨材運搬用のトラスを配置し、吊り橋を配置する」。
commons_translated
macadam aggregate appropriable appropriator accumulate inject suspension part compress concrete bridge abutment