A pneumatic tire having land sections with acute Angle sections, in which the level of air column tube resonance sound is reduced with uneven wear resistance maintained at high level.

一种充气轮胎，其包括具有锐角部的陆部，不仅能维持耐单边磨损性能，还能降低气柱共鸣声声级。

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A thermometer often now, and more often back in the early 1800s, consists of a glass tube up which a column of mercury or alcohol can travel from a reservoir at the base.

现在常见的温度计由一个玻璃管和一个位于底部的贮液槽组成，贮液槽中的水银或酒精沿玻璃管上升形成液柱。

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The precision of liquid column manometer was described. The correct use method and error correction of U tube manometer and double tube differential pressure gauge were analysed.

叙述了液柱式压力计的精度，对U形管压力计和双管差压计的正确使用方法及误差修正做了简要分析。

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The vibrations of the lips, focused and amplified by the mouthpiece and directed into the tube, cause the column of air inside the tube to vibrate, and as in all wind instruments, the vibrating air column produces the sound of the instrument.

NPR: Young Tuba Player Gets Nod from Phila. Orchestra

One is to change the length of the tube, and thus the length of the vibrating air column.

NPR: Young Tuba Player Gets Nod from Phila. Orchestra