shaft lining
11animal development — Introduction the processes that lead eventually to the formation of a new animal starting from cells derived from one or more parent individuals. Development thus occurs following the process by which a new generation of organisms is produced by …
12List of distinct cell types in the adult human body — There are about 210 distinct human cell types,.[1][2][3] There are between 50 and 75 trillion cells in the human body.[citation needed] Cell types can be classified by their tissue of origin. However, it is possible for some cells to have their… …
13iron processing — Introduction use of a smelting process to turn the ore into a form from which products can be fashioned. Included in this article also is a discussion of the mining of iron and of its preparation for smelting. Iron (Fe) is a… …
14Summit Tunnel fire — The Summit Tunnel fire occurred on a dangerous goods train passing through the Summit Tunnel on the Greater Manchester/West Yorkshire border, between Littleborough and Todmorden, England.HistoryThe tunnel was built in the late 1830s and was… …
15Ballast tamper — A ballast tamper or tamping machine is a machine used to pack (or tamp) the track ballast under railway tracks to make the tracks more durable. Prior to the introduction of mechanical tampers, this task was done by manual labour with the help of… …
16MetroWest Water Supply Tunnel — Official name MWWST Begins Marlborough Ends Weston Maintained by MWRA …
17Channel Tunnel — Map of the Channel Tunnel Overview Location English Channel (Strait of Dover) Coordinates Folkestone …
18Tunnel — This article is about underground passages. For other uses, see Tunnel (disambiguation). Underground tunnel for heatpipes between Rigshospitalet and Amagerværket in Denmark …
19Drum brake — A drum brake with the drum removed as used on the rear wheel of a car or truck. Note that in this installation, a cable operated parking brake uses the service shoes …
20Disc brake — Close up of a disc brake on a car On automobiles, disc brakes are often located with …
