multistage furnace
11List of Chinese inventions — A bronze Chinese crossbow mechanism with a buttplate (the wooden components have …
12environmental works — ▪ civil engineering Introduction infrastructure that provides cities and towns with water supply, waste disposal, and pollution control services. They include extensive networks of reservoirs, pipelines, treatment systems, pumping stations …
13Industrial fans — and blowers are valuable tools for moving air and materials required in a wide variety of manufacturing processes and industries, including cement, power, mining, coal treatment, pollution control, oil and gas, ethanol and steel. Ranging in size… …
14coal utilization — Introduction combustion of coal or its conversion into useful solid, gaseous, and liquid products. By far the most important use of coal is in combustion, mainly to provide heat to the boilers of electric power plants. Metallurgical coke… …
15Timeline of historic inventions — The timeline of historic inventions is a chronological list of particularly important or significant technological inventions. Note: Dates for inventions are often controversial. Inventions are often invented by several inventors around the same… …
16History of science — History of science …
17Ming Dynasty — Great Ming 大明 ← 1368–1644 …
18Pyridine — Pyridine …
19Han Chinese — This article is about the majority ethnic group within China. For other uses, see Han (disambiguation). Han Chinese 漢族/汉族 漢人/汉人 …
20Video camera tube — In older video cameras, before the mid to late 1980s, a video camera tube or pickup tube was used instead of a charge coupled device (CCD) for converting an optical image into an electrical signal. Several types were in use from the 1930s to the… …
