- floor of coal seam
- 煤层底板
English-Chinese geology dictionary (英汉地质大词典). 2013.
floor of coal seam
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coal mining — Coal was very important in the economic development of Britain. It was used as fuel in the factories built during the Industrial Revolution and continued to be important until the 1980s. The main coalfields are in north east England, the north… … Universalium
Coal assay — Coal Analysis techniques are specific analytical methods designed to measure the particular physical and chemical properties of coals. These methods are used primarily to determine the suitability of coal for coking, power generation or for iron… … Wikipedia
Coal mining — Men leaving a UK colliery at the close of a shift Surface coal mining in Wyo … Wikipedia
Floor — The upward facing structure of a building. *** (coal) The upper surface of the stratum underlying a coal seam. In coals that were formed in persistent swamp environments, the floor is typically a bed of clay, known as underclay,… … Energy terms
Seam — Seam, n. [OE. seem, seam, AS. se[ a]m; akin to D. zoom, OHG. soum, G. saum, LG. soom, Icel. saumr, Sw. & Dan. s[ o]m, and E. sew. [root] 156. See {Sew} to fasten with thread.] 1. The fold or line formed by sewing together two pieces of cloth or… … The Collaborative International Dictionary of English
Seam blast — Seam Seam, n. [OE. seem, seam, AS. se[ a]m; akin to D. zoom, OHG. soum, G. saum, LG. soom, Icel. saumr, Sw. & Dan. s[ o]m, and E. sew. [root] 156. See {Sew} to fasten with thread.] 1. The fold or line formed by sewing together two pieces of cloth … The Collaborative International Dictionary of English
Seam lace — Seam Seam, n. [OE. seem, seam, AS. se[ a]m; akin to D. zoom, OHG. soum, G. saum, LG. soom, Icel. saumr, Sw. & Dan. s[ o]m, and E. sew. [root] 156. See {Sew} to fasten with thread.] 1. The fold or line formed by sewing together two pieces of cloth … The Collaborative International Dictionary of English
Seam presser — Seam Seam, n. [OE. seem, seam, AS. se[ a]m; akin to D. zoom, OHG. soum, G. saum, LG. soom, Icel. saumr, Sw. & Dan. s[ o]m, and E. sew. [root] 156. See {Sew} to fasten with thread.] 1. The fold or line formed by sewing together two pieces of cloth … The Collaborative International Dictionary of English
Seam set — Seam Seam, n. [OE. seem, seam, AS. se[ a]m; akin to D. zoom, OHG. soum, G. saum, LG. soom, Icel. saumr, Sw. & Dan. s[ o]m, and E. sew. [root] 156. See {Sew} to fasten with thread.] 1. The fold or line formed by sewing together two pieces of cloth … The Collaborative International Dictionary of English
Seam — A bed of coal lying between a roof and floor. Equivalent term to bed, commonly used by industry. U.S. Dept. of Energy, Energy Information Administration s Energy Glossary … Energy terms
History of coal mining — Due to its abundance, coal has been mined in various parts of the world throughout history and continues to be an important economic activity today. Compared to wood fuels, coal yields a higher amount of energy per mass and could be obtained in… … Wikipedia
