0n a vessel ,a C02 extinguisher is checked by（）.
- Areading the gage pressure
- Bweighing the extinguisher
- Cdischarging a small amount of CO2
- Dseeing if the seal has been broke
问题
0n a vessel ,a C02 extinguisher is che
参考解析：
分类：航海英语综合练习题库
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