The combination of corrugation and the circular tube results in an extremely strong structure.

波浪纸板和圆筒状两者结合,会成为非常坚固的构造.

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The flowing state in narrow annuli changes apparently quicker than that in circular tube.

窄环隙流道内流态由层流向紊流转变明显提前.

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The circular tube belt conveyor is a new method for hoisting coal in a vertical shaft.

圆管胶带输送机是竖井提升煤炭的一种新方法.

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