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By the 2010s, the product was found in the US market under the name FONDAG cement (FOND Aluminous Aggregate), sometimes referred to as ALAG (ALuminous AGgregate). FONDAG cement is a mix of up to 40 percent alumina, and is stable at high temperatures and thermal cycling from −184–1,093 °C (−300–2,000 °F; 89–1,400 K; 160–2,500 °R) [4]
Telephone numbers in area code 678 were first assigned to customers signing up for new telephone service on January 15, 1998. On September 2, 2001, area code 470, was added to the 678 overlay area of area codes 404 and 770. [1] Telephone numbers from the NPA were assigned after exhaustion of area code 678.
SAL Yokohama Alumina 0 100% Showa Denko KK [5] Japan Shimizu Alumina 0 100% Nippon Light Metal [5] (United Nations 2000) Kazakhstan Pavlodar Alumina 1,540 100% Alkaz [5] (United Nations 2000) Montenegro Podgorica Alumina 0 Kombinat Aluminijuma Podgorica, CAV [5] (United Nations 2000) Romania Oradea 400 shut down in 2002 Romania Tulcea
Calcium aluminate bioceramic material - (alumina cement in minerals, calcium aluminate cements in bioceramics) Alumina is an initial fast setting element and high compressive strength. It has been used as dental products as luting agent. Calcium aluminate cement (bioceramic) has been developed for dental products and root-end filling material.
An AFm phase is an "alumina, ferric oxide, monosubstituted" phase, or aluminate ferrite monosubstituted, or Al 2 O 3, Fe 2 O 3 mono, in cement chemist notation (CCN). AFm phases are important hydration products in the hydration of Portland cements and hydraulic cements.
When it changed to 10 digit dialing people started having to remember area codes all the time. When 770 came out people started writing 7/ as short hand for the area code, so when 678 was introduced it was treated the same way with a 6/. Atlanta had 10 digit dialing before the rest of the country so it's probably not common in most other areas.
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