Halon extinguishers used on a class C fire should be directed at the（）.<br>A:base of the equipment<br>B:top of the equipment<br>C:power source<br>D:source of the fire

Halon extinguishers used on a class C fire should be directed at the（）.
A:base of the equipment
B:top of the equipment
C:power source
D:source of the fire

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