Each drilling unit equipped with helicopter fuel storage tanks must have the tanks installed as far as practicable from the（）.<br>A:landing area and sources of vapor ignition<br>B:main deck<br>C:engine room<br>D:drill floor

Each drilling unit equipped with helicopter fuel storage tanks must have the tanks installed as far as practicable from the（）.
A:landing area and sources of vapor ignition
B:main deck
C:engine room
D:drill floor

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