When securing a flash-type evaporator for an extended period of time, you should （）.
- Afill the unit with saltwater
- Bfill the unit with de-scaling compound
- Ccompletely drain the unit
- Dtightly seal the unit to exclude air
问题
When securing a flash-type evaporator
参考解析：
分类：船舶辅助机械题库
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