名词
中文翻译：直筒
同义词：
['straight tube', 'straight pipe']
例句：
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1.The carpenter used a straight barrel to cut the wood.
木匠用直筒来切割木材。
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2.The policeman used a straight barrel to search the house.
警察用直筒搜查房子。
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3.The engineer used a straight barrel to measure the length of the pipe.
工程师用直筒测量管子的长度。