Chiu and Seman (1971) studied the head loss of flows transporting sediment in circular and square pipes with spiraling motion.
邱和思门(1971)研究了在圆管和方形管中输沙时具有螺旋运动的水流的水头损失问题。
But the lion's mighty pipes are square.
但狮子强有力的声带是方形的。
But the lion's mighty pipes are square, tigers' too.
但是狮子那根强有力的管道式方形的，老虎也是。
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