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| Pulsed power welding
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Electric arc process of welding using computer controlled welding machine, which emits programmed short pulses of electric power. |
| Pultrusion
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The shaping of an object, such as those made of fiberglass, by pulling it through a die. |
| Pulverize
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(1) To crush or grind into a powder or dust. (2) To break down completely. |
| Pumice
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A spongy, light, porous volcanic rock used in solid or powdered form for smoothing, scouring, and polishing. |
| Pump
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Any of the various machines that force a liquid or gas into or through, or draw it out of something, by pressure or suction. |
| Pumped storage facility
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A type of power generating facility that pumps water to a storage reservoir during off-peak periods, and uses the stored water (by allowing it to fall through a hydro turbine) to generate power during peak periods. The pumping energy is typically supplied by lower cost base power capacity, and the peaking power capacity is of greater value, even though there is a net loss of power in the process. |
| Pumping level
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The lowest water level reached during pumping operation. |
| Punch
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Round metal tool that has a pointed end, which is used to make indentations or holes in a material. The point is placed against the object and the other side is hammered to drive the point into the material or to drive a nail head even with or below the surface of a board. |
| Punch list
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List, detailing items to be fixed, which is compiled by a buyer prior to closing on a property. |
| Punching shear resistant
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The ability of a material to resist damage from normally expected conditions. |
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