（） should be tested and adjusted when the boiler survey is carried out.<br>A:The boiler oil tank<br>B:The steam pipe<br>C:The fire side<br>D:The safety valves

（） should be tested and adjusted when the boiler survey is carried out.
A:The boiler oil tank
B:The steam pipe
C:The fire side
D:The safety valves

出自：海船船员证

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