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释义
society > occupation and work > equipment > piercing or boring tools > [noun] > boring tool > for boring in the ground > equipment for use with (7)
sinking-chain1820

part of the apparatus of a pit-shaft boring-rod.

runner1839

Mining. A metal attachment by means of which a rope is connected to a set of boring rods, so enabling them to be lifted. Now rare.

rotary table1845

(a) Engineering a graduated metal disc used to support a workpiece to enable the operator to drill or cut at exact angular intervals about an…

wad hook1881

(a) a spiral tool for withdrawing wads or charges from guns; (b) Mining (see quot. 1881).

socket1883

technical. (See quots.)

spreadera1884

An attachment for a boring rod used to scatter the detritus produced around a hole as it is bored. Obsolete. rare.

whipstock1903

Oil Industry. A long, tapered steel wedge which can be placed at the bottom of a hole to cause the drilling bit to deviate sideways, e.g. in…

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更新时间:2025/3/22 3:33:56