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Cementite (or iron carbide) is a compound of iron and carbon, more precisely an intermediate transition metal carbide with the formula Fe 3 C. By weight, it is 6.67% carbon and 93.3% iron. By weight, it is 6.67% carbon and 93.3% iron.
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Boron carbide, B 4 C, on the other hand, has an unusual structure which includes icosahedral boron units linked by carbon atoms. In this respect boron carbide is similar to the boron rich borides. Both silicon carbide (also known as carborundum) and boron carbide are very hard materials and refractory. Both materials are important industrially.
Trưng Trắc was the first female monarch in Vietnam, as well as the first queen in the history of Vietnam (Lý Chiêu Hoàng was the last woman to take the reign and is the only empress regnant), and she was accorded the title Queen Trưng (chữ Quốc ngữ: Trưng Nữ vương, chữ Hán: 徵女王) in the Đại Việt sử ký toàn thư.
In late 2015, the plant outputted the first hot rolled coil manufactured in Vietnam. [11] "Phase 1" Blast furnace iron production was scheduled to begin in 2016, with two blast furnaces at the plant having a total production capacity of 7.5 MT pa; approximately 6 MT were for flat steel production, and 1.5 MT for rebar and other rolled steels. [12]
Tam Cốc – Bích Động is a popular tourist destination in north Vietnam and part of the Tràng An Scenic Landscape Complex UNESCO World Heritage site. [1] It is located in Ninh Binh province , near the village of Tam Cốc.
Central Vietnam (Vietnamese: Trung Bộ or miền Trung), also known as Middle Vietnam or The Middle, formerly known as Trung Việt by the State of Vietnam, Trung Phần by the Republic of Vietnam, [1] Trung Kỳ or Annam under French colonial rule, is one of the three geographical regions within Vietnam. The name Trung Bộ was used by the ...
Kien Trung Palace (Vietnamese: Điện Kiến Trung; chữ Hán:建中殿) is a palace within the Imperial City of Huế, the former imperial capital of Vietnam. It was the residence of the last two emperors of the Nguyễn dynasty. [1] It was destroyed by the Viet Minh in 1947 during the Indochina Wars. Reconstruction started in 2019 and was ...