“break switch”

The following 2 entries include the term break switch.

air-break switch

noun

: an electrical switch that breaks the circuit in air compare oil-break switch

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oil-break switch

noun

: a switch in which the contacts are immersed in oil compare air-break switch

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  • any of a genus helianthus especially h annuus of new world composite plants with large yellow rayed flower heads bearing edible seeds that yield an edible oil
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