名词
中文翻译：直管
同义词：
['straight pipe', 'straight tube']
例句：
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1.The chef used a straight fluted hob to make the perfect steak.
厨师用直火管烤出了完美的牛排。
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2. The engineer designed a straight fluted hob for the new machine.
工程师为新机器设计了直火管。
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3.The scientist discovered that the straight fluted hob could improve the efficiency of the experiment.
科学家发现直火管可以提高实验的效率。