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A mattock (/ ˈ m æ t ə k /) is a hand tool used for digging, prying, and chopping. Similar to the pickaxe, it has a long handle and a stout head which combines either a vertical axe blade with a horizontal adze (cutter mattock), or a pick and an adze (pick mattock). A cutter mattock is similar to a Pulaski used in fighting fires.
The Pulaski is a specialty hand tool used in fighting fires, particularly wildfires, [1] which combines an axe and an adze in one head. Similar to a cutter mattock, it has a rigid handle of wood, plastic, or fiberglass. The Pulaski was developed for constructing firebreaks, able to both dig soil and chop wood.
Wayne Junction receives 230 kV 60 Hz power from two redundant lines that connect to PECO substations at Waneeta, Tabor and Pulaski. Two 60 MVA 230/13.2 kV transformers reduce voltage for the static frequency converters. Cross-ties allow removing portions of the supply system from service for maintenance.
Edward Crockett Pulaski (February 9, 1866 – February 2, 1931) was a U.S. Forest Service ranger based in Wallace, Idaho. [2] Pulaski traveled west and worked as a miner, railroad worker, and ranch foreman before joining the forest service in 1908. [3] He was reputed to be, and personally claimed that he was, a collateral descendant of Casimir ...
An integrated power supply is one that shares a common printed circuit board with its load. An external power supply, AC adapter or power brick, is a power supply located in the load's AC power cord that plugs into a wall outlet; a wall wart is an external supply integrated with the outlet plug itself. These are popular in consumer electronics ...
US Bayonet Model 1873 Trowel. In 1870, the U.S. Army introduced the trowel bayonet, intended for individual soldiers as both a weapon and an entrenching tool. [7] [8] [6] This was followed by the development of separate trowel and spade tools, small one-hand implements that could be carried as part of a soldier's individual equipment.
This is a critical point – each power supply must be able to power the entire server by itself. Redundancy is further enhanced by plugging each power supply into a different circuit (i.e. to a different circuit breaker). Redundant protection can be extended further yet by connecting each power supply to its own UPS.
A regulated power supply is an embedded circuit; it converts unregulated AC (alternating current) into a constant DC. With the help of a rectifier it converts AC supply into DC. Its function is to supply a stable voltage (or less often current), to a circuit or device that must be operated within certain power supply limits.