drill shaft
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Shaft construction — concerns the building of vertical openings such as Raises and Shafts. Shafts are vertical openings used for supplying equipment, personnel, and support systems to the horizontal tunnel where the pipeline is installed. They can be temporary or… … Wikipedia
Drill bit — For the fictional character, see Drill Bit (Transformers). For the cancelled skyscraper nicknamed Drill bit, see Chicago Spire. For the types used in drilling wells, see Well drilling. From top to bottom: Spade, lip and spur (brad point), masonry … Wikipedia
shaft — noun ADJECTIVE ▪ deep ▪ vertical ▪ narrow ▪ elevator (AmE), lift (BrE) ▪ She almost fell down an elevator shaft … Collocations dictionary
drill — {{Roman}}I.{{/Roman}} noun Drill is used before these nouns: ↑hole, ↑sergeant Drill is used after these nouns: ↑evacuation, ↑fire, ↑hand, ↑practice, ↑pronunciation {{Roman}}II.{{/Roman}} verb Drill is used with these nouns as the object: ↑ … Collocations dictionary
Bow drill — The bow drill is an ancient tool. While it was usually used to make fire, it was also used for primitive woodworking and dentistry. It consists of a bearing block or handhold , a spindle or drill , a hearth or fireboard , and a simple bow .… … Wikipedia
hand drill — noun a small portable drill held and operated by hand • Syn: ↑handheld drill • Hypernyms: ↑drill * * * noun 1. : a small portable drilling machine resembling a breast drill but designed to be held and operated by hand 2. : a primitive drill… … Useful english dictionary
pump drill — noun : a primitive drill in which the shaft is revolved by working up and down a bow or bar carrying a cord attached at the center to the upper end of the shaft … Useful english dictionary
Persian drill — Persian Per sian, a. [From Persia: cf. It. Persiano. Cf. {Parsee}, {Peach}, {Persic}.] Of or pertaining to Persia, to the Persians, or to their language. [1913 Webster] {Persian berry}, the fruit of {Rhamnus infectorius}, a kind of buckthorn,… … The Collaborative International Dictionary of English
disk drill — noun 1. : a primitive drill in which the shaft is weighted by a disk and which is operated by a strap or bow 2. usually disc drill : a drill for sowing grain or seeds using discs as furrow openers … Useful english dictionary
Pin drill — Pin Pin, n. [OE. pinne, AS. pinn a pin, peg; cf. D. pin, G. pinne, Icel. pinni, W. pin, Gael. & Ir. pinne; all fr. L. pinna a pinnacle, pin, feather, perhaps orig. a different word from pinna feather. Cf. {Fin} of a fish, {Pen} a feather.] 1. A… … The Collaborative International Dictionary of English
Vertical drill — Vertical Ver ti*cal, a. [Cf. F. vertical. See {Vertex}.] [1913 Webster] 1. Of or pertaining to the vertex; situated at the vertex, or highest point; directly overhead, or in the zenith; perpendicularly above one. [1913 Webster] Charity . . . is… … The Collaborative International Dictionary of English
