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Shaft mining or shaft sinking is the action of excavating a mine shaft from the top down, where there is initially no access to the bottom. [1] Shallow shafts , typically sunk for civil engineering projects, differ greatly in execution method from deep shafts, typically sunk for mining projects.
The term wrench is generally used for tools that turn non-fastening devices (e.g. tap wrench and pipe wrench), or may be used for a monkey wrench—an adjustable pipe wrench. [1] In North American English, wrench is the standard term. The most common shapes are called open-end wrench and box-end wrench.
Socket set with ratchet (above), four hex sockets and a universal joint. A socket wrench (or socket spanner) is a type of spanner (or wrench [1] in North American English) that uses a closed socket format, rather than a typical open wrench/spanner to turn a fastener, typically in the form of a nut or bolt.
A security Torx L-key and fastener with holes for a safety pin to hinder disassembly with an ordinary Torx key. A Torx T8 screw head on a hard disk drive.. Torx (pronounced / t ɔːr k s /) is a trademark for a type of screw drive characterized by a 6-point star-shaped pattern, developed in 1967 [1] by Camcar Textron.
Coes Wrench Company was a tool manufacturing company based in Worcester, Massachusetts. The company was originally part of the L. and A. G. Coes & Co. [1] The Coes Wrench Company was founded April 1, 1888. [2] Coes Wrench Company manufactured the screw type wrench invented by Loring Coes; this wrench is commonly known as a monkey wrench.
A Charles Monk (not Moncky) lived in the Williamsburg section of Brooklyn in the 1880s where he made and sold moulder's tools, not mechanics' tools like a monkey wrench. [13] He could not have invented or named the monkey wrench because he was born after the term first appeared in print.
Commercial real estate has beaten the stock market for 25 years — but only the super rich could buy in. Here's how even ordinary investors can become the landlord of Walmart, Whole Foods or Kroger
The "Murray Springs shaft wrench" appears to be a unique North American example of a similar tool made of bone and comes from the Clovis culture. It dates to about 9,000 years ago and was found in Arizona, where it is now in the Arizona State Museum. It is 259mm long and undecorated, with a simple shaft with a larger end, which has a single ...