I have a security question for everyone

2011-02-28View Original

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Handheld power tools without double insulation shall have ( ). 　　A. Explosion protection device B. Grounding device C. Load protection device D. Power-off protection device. The answer commonly given online is B; why is B the correct choice?

Reply #22011-02-28

　　Handheld power tools must be equipped with electric shock protection devices; the answer is obviously B first.

Reply #32011-03-01

Reply 2# *ongrenjun* has learned it, thank you! !

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I have a security question for everyone

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