While several types of hoppers exist, they generally have a high velocity stream of mud going through them and a means of mixing either dry or liquid mud additives into the whole mud stream.

有许多不同类型的漏斗搅拌器，通常这些漏斗搅拌器都有高速泥浆流经其间，并混合干或湿的泥浆添加剂到整个泥浆系统中。

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The characteristic of this model is only to know basic and natural boundary condition, then the stream function and flow velocity required on the boundary are obtained.

这一模型的特点只需要知道边界上的基本边界条件和自然边界条件，就可以得到边界上所需要求的流函数和水流速度；

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Anchoring "Deep Green" and steering the tethered "kite" enables the turbine to capture energy from the tidal currents at ten times the speed of the actual stream velocity, say Minesto.

Minesto表示，只要控制好这种深海绿色能源，或者是说放好这只“风筝”，人们便能够从这里获取到来自潮汐的能源，而深海里的水流速度往往10倍于海表面。

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