名词
中文翻译：空心管
同义词：
['hollow tube', 'hollow conduit']
例句：
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1.The hollow pipe was filled with sand to make it stronger.
这个空心管被填充了沙子来使它更坚固。
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2. The hollow pipe was used as a water supply for the farm.
这个空心管被用作农场的水源。
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3.The hollow pipe was used to carry gas from one end to the other.
这个空心管用来从一端输送气体到另一端。