Pipeline has become an important transport way, in parallel with railway, highway, aviation and water means.

管道输送已成为与铁路、公路、航空、水运并行的五大运输手段之一。

The characters and mechanism of the transport way, and the calculation and measurement method of the efficiency of the pipe cyclone are presented.

文章侧重讨论螺旋管流输移固粒的特征机理与起旋器效率的测试与计算方法。

Other innovations of the late fourth millennium include the wheel, probably developed first as a more efficient way of making pottery and then transferred to transport.

第四千禧年后期的其他创新包括轮子，可能首先是作为一种更有效的制陶方式发展起来的，然后才被转移到运输上。