all drilled hole

全部钻孔

English-Chinese electricity dictionary (电气专业词典). 2013.

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  • Hole saw — Not to be confused with Core drill. A 52 mm (2.0 in) hole saw with pilot bit …   Wikipedia

  • Through-hole technology — Through hole technology, also spelled thru hole , refers to the mounting scheme used for Pin through hole (PTH) electronic components that involves the use of pins on the components that are inserted into holes drilled in printed circuit boards… …   Wikipedia

  • Hughes bore hole — The Hughes borehole is an acid mine drainage site located near the southwest central borough of Portage, Pennsylvania in Cambria County. In the 1920s, a hole was drilled in order to remove water from the myriad coal mines in the area. In the… …   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

  • Drilling rig — For a detailed diagram of a Petroleum drilling rig, see List of components of oil drilling rigs. Drilling rig preparing rock blasting …   Wikipedia

  • petroleum production — Introduction       recovery of crude oil and, often, associated natural gas from the Earth.        petroleum is a naturally occurring hydrocarbon material that is believed to have formed in deep sedimentary (sedimentary rock) beds from animal and …   Universalium

  • Printed circuit board — Part of a 1983 Sinclair ZX Spectrum computer board; a populated PCB, showing the conductive traces, vias (the through hole paths to the other surface), and some mounted electrical components A printed circuit board, or PCB, is used to… …   Wikipedia

  • List of Chinese inventions — A bronze Chinese crossbow mechanism with a buttplate (the wooden components have …   Wikipedia

  • Rivet — A rivet is a mechanical fastener. Before it is installed it consists of a smooth cylindrical shaft with a head on one end. The end opposite the head is called the buck tail. On installation the rivet is placed in a pre drilled hole. Then the tail …   Wikipedia

  • hand tool — any tool or implement designed for manual operation. * * * Introduction  any of the implements used by craftsmen in manual operations, such as chopping, chiseling, sawing, filing, or forging. Complementary tools, often needed as auxiliaries to… …   Universalium

  • Offshore oil and gas in the United States — provides a large portion of the nation’s oil and gas supply. Large oil and gas reservoirs are found in the sea nearby Louisiana, Texas, California, and Alaska. Environmental concerns have prevented or restricted offshore drilling in some areas,… …   Wikipedia


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