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In order to discharge a CO2 portable fire extinguisher, the operator must FIRST ______.
A.invert the CO2 extinguisher
B.squeeze the two trigger handles together
C.remove the locking pin
D.open the discharge valve
参考答案
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the date that it was installedC
the names of the individuals qualified to use itD
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invert the CO extinguisherB
squeeze the two trigger handles togetherC
remove the locking pinD
open the discharge valve
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