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Mesabi tripod
| Diamond Glossary (алмазы и бриллианты - глоссарий терминологии) |
A drill tripod having a back upright unit made with two poles spaced about 24 inches apart at the bottom and about 12 inches apart at the top and joined together by step strips to form a ladder. compare michigan tripod.
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Mesabi, английский
Casing. nonstandard-size flush-joint casing, usually made from a 1%-inch-inside-diameter and l2%2-inch-outside-diameter standard pipe. also called e casing, b mesabi casing, mesabi casing.
Mesabi casing, английский
Mesabi e casing
Mesabi non-bessemer ore, английский
Mesabi structural drilling, английский
A method of mineral exploration drilling, developed on the western mesabi range and utilizing reverse-circulation wash boring and/or churn drilling to drill through and obtain samples of the soft (wash ore) or fractured bodies of iron ore.
Tripod, английский
- "станок".
- Transit injector polaris-de- rived
- The three-legged device that is almost always topped with a tripod head (for panning and tilting) which supports cameras of various types. tips: a tripod or dolly is recommended not only to steady and move the camera (especially with long lenses and long shooting sessions) but also to make framing and composing the shot simpler. tip: never lean a closed tripod against the wall: gravity always wins and heads will roll. see: hand-holding.
- A three-legged device with a platform or head for attaching the camera, used to steady the camera during exposure. it is most useful for exposures longer than 1/30 second, or when a constant framing must be maintained throughout a series of shots.
- A framework of wood or metal over a drill and platform composed of three principal members (legs) inclined toward, and fastened at, a common joint with a bolt on which a clevis and attached sheave is suspended. it is alined over the center line of the borehole and the hoisting drum on the drill machine. compare michigan tripod.
Tripod base, английский
A sturdy three-legged base.
Tripod bolt, английский
A large heavy bolt that pins together the upper ends of the three tripod legs.
Tripod clevis, английский
A heavy clevis, pinned by the tripod bolt in the top of a tripod, from which the hoisting sheave is suspended.
Tripod data systems, английский
Tripod jacket, английский
Рнеошгеит)ч атая тренога (опорный блок в виде решетчатой тре
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Michigan tripod, английский
A drill structure consisting of three barked timber poles of pine or fir about 25 feet long, the butt ends of which generally are about 12 inches in diameter. through the upper or smaller ends of the poles, holes are drilled, through which a 1-inch bolt is passed to join the three poles. on the bolt, a large clevis is hung, the open ends of which straddle the center pole. the sheave is suspended on the clevis, and the poles are placed in a raised position (pyramid fashion) over the drill with the sheave alined over the hoisting drum and the borehole and the center pole placed behind the drill. in its raised position the tripod is high enough to provide a minimum of 22 feet of headroom above the drill floor. compare mesabi tripod.
Medium-stone bit, английский
A bit with diamonds ranging from 8 to 40 per carat in size.
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