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tunnels and underground excavations — ▪ engineering Introduction Great tunnels of the world Great tunnels of the worldhorizontal underground passageway produced by excavation or occasionally by nature s action in dissolving a soluble rock, such as limestone. A vertical opening … Universalium
Milling machine — For the machine used in road construction, see Asphalt milling machine. Not to be confused with mill (grinding). Example of a bridge type CNC vertical milling center … Wikipedia
Milling cutter — Milling cutters are cutting tools typically used in milling machines or machining centres (and occasionally in other machine tools). They remove material by their movement within the machine (e.g., a ball nose mill) or directly from the cutter s… … Wikipedia
Table saw — A table saw, equipped for cutting large pieces of sheet stock. Other names Sawbench Classification Power tool Manufacturer Bosch, Makita … Wikipedia
Mitre box — A mitre box (US spelling, miter box ) is a woodworking tool used to guide a hand saw to make precise mitre cuts in a board. A home made manual miter sawing box. The most common form of a mitre box is a 3 sided box which is open at the top and the … Wikipedia
Slip joint pliers — Common, two position straight slip joint pliers Slip joint pliers are pliers whose pivot point or fulcrum can be moved to increase the size range of their jaws. Most slip joint pliers use a mechanism that allows sliding the pivot point into one… … Wikipedia
opening — I (New American Roget s College Thesaurus) Open space Nouns 1. opening, hole, foramen; aperture, yawning, oscitancy, dehiscence; chasm (see interval); breach. 2. (small opening) puncture, perforation, scuttle; pinhole, keyhole, loophole, porthole … English dictionary for students
Ann Arbor, Michigan — For other uses, see Ann Arbor (disambiguation). City of Ann Arbor City … Wikipedia
Saw — For other uses, see Saw (disambiguation). Saw A crosscut hand saw about 620 mm (24 inches) long Classification Cutting Types Hand saw Back saw Bow saw Circular saw … Wikipedia
Chainsaw — For other uses, see Chainsaw (disambiguation). An arborist using a chainsaw to fell a eucalyptus tree A chainsaw (or chain saw) is a portable mechanical saw, powered by electricity, compressed air, hydraulic power, or most common … Wikipedia
Wrench — For other uses, see Wrench (disambiguation). A set of chrome vanadium metric wrenches, open at one end, box/ring at the other. This type is commonly known as a combination wrench. A wrench or spanner is a tool used to provide grip and mechanical… … Wikipedia
