单选题When viewed from astern, if the propeller revolves in a clockwise direction when going ahead, it is known as （）.Aahead directionBastern directionCright-handedDleft-handed
单选题
When viewed from astern, if the propeller revolves in a clockwise direction when going ahead, it is known as （）.
A
ahead direction
B
astern direction
C
right-handed
D
left-handed
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