Retaining wall.jpg
Kolchak1923
en
Retaining wall, Retaining wall (CBR)
commons
en
Retaining wall, Circum-Baikal Railway
commons
ja
壁面残欠
commons_translated
ja
壁面残高、サーカム・バイカル鉄道
commons_translated
retainable retained sheet pile retaining wall retain background radiation