| profile bending machine |
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| profile machining center |
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| projector |
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| protection relay An electrical relay that is used for cutting the power to a sensitive piece of equipment when dangerous conditions are suggested by the signals returned by certain sensors |
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| protective bellows |
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| protective clothing Clothing that is worn by the user to give protection to the body and inner clothing against being marked or damaged |
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| protective cover |
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| protective gloves Gloves that are worn by the user to give protection to the hands |
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| protective suit Close-fitting clothing that is worn by the user to give protection to the body and inner clothing against being marked or damaged |
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| prototyping machine A machine for making prototype models of a given design, based on signals from the computer aided design system |
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| proximity sensor A sensor for monitoring the (small) distance to a given object |
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| proximity switch An electrical switch that makes and breaks its contacts when an object approaches below a certain threshold distance |
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| pulley |
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| pulsed laser A laser that delivers a short intense pulse, during the stimulated emission part of the cycle, and then is quiet again for the next pump cycle (as opposed to a continuous wave laser) |
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| punching machine A machine for punching sheet materials (either to put holes in prescribed places in the sheet, or to generate small flat objects from the sheet) |
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| push-button switch An electrical switch that makes and breaks its contacts as its control is pushed in, or allowed to spring out |
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| pyrometer Apparatus for measuring very high temperatures |
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