The flow pattern of ideal fluid, dense floating fluid and wet concrete in conveyingtube are briefly analyzed in this paper. The calculation of pumping resistance is also introduced.
本文对理想流体、浓浮流体和混凝土在输送管道中的流动形态，进行了扼要分析，并对泵送阻力运算作了概述。
2
By adopting the device, the vacuum tube can be always positioned on the back of the bed layer of the catalyst, thereby improving the conveying efficiency.
使用该发明的装置就可以使真空管一直在催化剂床层的背部，从而提高了输送效率。
3
The invention relates to a conveying device, in particular to a conveying device applied in the tube blank stretching process.