Ferro-concrete — Fer ro con crete, n. (Arch. & Engin.) Concrete strengthened by a core or foundation skeleton of iron or steel bars, strips, etc. Floors, columns, piles, water pipes, etc., have been successfully made of it. Called also {armored concrete steel},… … The Collaborative International Dictionary of English
reenforced concrete — Ferro concrete Fer ro con crete, n. (Arch. & Engin.) Concrete strengthened by a core or foundation skeleton of iron or steel bars, strips, etc. Floors, columns, piles, water pipes, etc., have been successfully made of it. Called also {armored… … The Collaborative International Dictionary of English
Inner German border — Innerdeutsche Grenze North and central Germany … Wikipedia
Bank vault — A bank vault is a secure space where money, valuables, records, and documents can be stored. Vaults protect their contents with armored walls and a tightly fashioned door closed with a complex lock. Vault technology developed in a type of arms… … Wikipedia
Ouvrage Cap Martin — Part of Maginot Line, Alpine Line Menton and Roquebrune … Wikipedia
Mougin turret — The Mougin turret is a land based revolving gun turret that housed some of the heaviest armament in French fortifications of the late 19th and early 20th centuries. While not reliably resistant to the explosive shells of opposing artillery,… … Wikipedia
Ouvrage Einseling — Part of Maginot Line Northeast France … Wikipedia
Ouvrage Laudrefang — Part of Maginot Line Northeast France … Wikipedia
Ouvrage Rimplas — Part of Maginot Line, Alpine Line Southeast France … Wikipedia
Ouvrage Coume Annexe Sud — Part of Maginot Line Northeast France … Wikipedia