He clamped the cylinder, upright, on a small turntable and set it spinning.
他钳紧圆筒,笔直放在一个小旋盘上,开始旋转。
A cylinder a hollow tube a closed concave base that permits the cylinder to stand upright.
钢瓶是中空的管道,封闭的底部是凹入的,这样可以直立起来。
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