The straight tube of spigot is an important structural parameter of hydrocyclone.

沉砂口直管段是水力旋流器的一个重要构件。

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The MF System features Straight Tube Coriolis Mass Flow Meters that are the most reliable meter in the industry.

MF系统直管科氏质量流量计是业界最可靠的产品。

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Test results from an experimental investigation of the effect of nozzle on the thrust of a straight tube pulse detonation engine are presented.

在直管脉冲爆震发动机上安装不同类型的喷管，利用推力传感器测量了不同频率下发动机的瞬态推力和平均推力。

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Another popular type, the quill mum,has long, straight petals like a tube or needle.

VOA: special.2010.06.29

On top of the mess, one straight tube juts out, a square of gray duct tape hanging from it, flapping in the breeze, a flag of surrender.

NPR: L.A. Looks to Cut Smog with Leaf Blower Trade-In

They could be used to build an artificial artery in a test tube or the stem cells could be injected straight into the heart and they could form within it.

FORBES: Why Medical Treatment is Going to Get Much Cheaper