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| Plug
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(1) An object used to stop up a hole or gap. (2) Wood or other filler used in filling a hole. (3) An electrical device (male fitting) with projecting prongs, to be fitted into an outlet to make contact and provide electrical power. (4) A small wedge or segment cut from something. (5) Threaded fitting to screw in to the end of a female pipe-fitting to seal it closed. |
| Plug and feather rock splitter
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Device used to split rock which is a split plug with an internal taper along with a feather, a wedge shaped rod. When the plug is drilled into the rock, the feather is wedged into the plug, forcing it apart and splitting the rock. |
| Plug cutter
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| Plug ejecting arbor system
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The plug ejecting arbor system removes the plug created when using a hole saw bit. |
| Plug flow digester
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A type of anaerobic digester that has a horizontal tank in which a constant volume of material is added and forces material in the tank to move through the tank and be digested. |
| Plug gauge
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Inside diameter gauge used to measure, with precision, small holes for dowels, tap sizes, etc. and for precision work on machines. |
| Plug weld
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Weld which is made through a hole in a piece of metal to fasten the piece to another piece below the hole or for filling in the hole. |
| Plug-in bus duct
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Electrical conductor, which is mounted in a sheet metal enclosure, called a bus, which goes through an industrial building to provide power, with the use of plug in ports along the length of the bus, to lathes and other heavy equipment. |
| Plug-in strip
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Electrical wiring strip, encased in a cover, which has outlets for plugs. |
| Plumb
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Precisely vertical. Also to test for, or to make vertical. Also to perform plumbing work. |
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