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单词 Neon tester
释义

Neon tester

英语百科

Test light

(重定向自Neon tester)
 A voltage tester with three lamps to give an approximate indication of voltage magnitude
Neon screwdriver test light in use. Current flows through the lamp and the distributed capacitance and resistance of the user's body.
Non-contact voltage tester detects the changing electric field around live wires
North American grounded receptacle tester

A test light, test lamp, voltage tester, or mains tester is a simple piece of electronic test equipment used to determine the presence or absence of an electric voltage (usually alternating current (AC) ) in a piece of equipment under test.

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