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| 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. |
| PLUMB BOB OR PLUMMET
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A lead weight, often pointed at the bottom end, hung at the end of a line and left freely swinging, to determine whether something is perfectly vertical. Since gravity forces the cord to hang in an absolute vertical, the plumb bob is used to align walls and any surface that must be completely straight. |
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