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The Tanks were mentioned in some manuscripts after the coming of Islam to Yemen in the 7th century A.D. "Aden has Tanks that store water when the rain falls", wrote Al-Hamdani in the 10th century. [2] Al-Makdsi, writing three centuries later, also recorded the presence of wells and cisterns in Aden. [3]
Ferrocement or ferro-cement [1] is a system of construction using reinforced mortar [2] or plaster (lime or cement, sand, and water) applied over an "armature" of metal mesh, woven, expanded metal, or metal-fibers, and closely spaced thin steel rods such as rebar. The metal commonly used is iron or some type of steel, and the mesh is made with ...
An elevated water tank, also known as a water tower, will create a pressure at the ground-level outlet of 1 kPa per 10.2 centimetres (4.0 in) or 1 psi per 2.31 feet (0.70 m) of elevation. Thus a tank elevated to 20 metres creates about 200 kPa and a tank elevated to 70 feet creates about 30 psi of discharge pressure, sufficient for most ...
A septic tank is part of a small-scale sewage treatment system often referred to as a septic system. Septic systems are commonly used to treat wastewater from homes and small businesses in rural and suburban areas. [9] It consists of the tank and a septic drain field. Waste water enters the tank where solids can settle and scum floats.
The advantage of ferrocement construction is that materials are cheap and readily available, while the disadvantages are that construction labor costs are high, as are operating costs. (Ferrocement ships require thick hulls, which results in either a larger cross-sectional area that hurts hydrodynamics, or leaves less space for cargo.)
Family Dollar Stores recalled about 67,000 remote-controlled toy tanks after getting five reports of the controllers overheating and melting, the U.S. Consumer Product Safety Commission said. So ...
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