monolithic concrete lining
1Shaft construction — concerns the building of vertical openings such as Raises and Shafts. Shafts are vertical openings used for supplying equipment, personnel, and support systems to the horizontal tunnel where the pipeline is installed. They can be temporary or… …
2Polyurea — is a type elastomer that is derived from the reaction product of an isocyanate component and a synthetic resin blend component. The isocyanate can be aromatic or aliphatic in nature. It can be monomer, polymer, or any variant reaction of… …
3SYNAGOGUE — This article is arranged according to the following outline. origins and history until the first century first century c.e. middle ages modern period …
4harbours and sea works — Introduction harbour also spelled harbor any part of a body of water and the manmade structures surrounding it that sufficiently shelters a vessel from wind, waves, and currents, enabling safe anchorage or the discharge and loading of… …
5Mithraic mysteries — Double faced Mithraic relief. Rome, 2nd to 3rd century AD. Louvre Museum The Mithraic Mysteries were a mystery religion practised in the Roman Empire from about the 1st to 4th centuries AD. The name of the Persian god Mithra, adapted into Greek… …
6Freeze casting — Freeze casting, or freeze gelation is a form of sol gel processing of ceramics that enables a ceramic object to be fabricated in complex shapes, without the need for high temperature sintering.The process is simple, but the science is, as of 2005 …
7United States — a republic in the N Western Hemisphere comprising 48 conterminous states, the District of Columbia, and Alaska in North America, and Hawaii in the N Pacific. 267,954,767; conterminous United States, 3,022,387 sq. mi. (7,827,982 sq. km); with… …
