And centrifugal pumps compared with single-screw pump do not need to install the valve, while the linear flow of traffic is stable.
和离心泵相比，单螺杆泵不需要装阀门，而流量是稳定的线性流动。
2
With the piston pump, diaphragm and gear pumps is different is that single-screw pump can be used for pharmaceutical filling and measurement.
与柱塞泵、单螺杆泵及齿轮泵不同的是，单螺杆泵可用于药剂填充和计量。
3
And diaphragm compared to single-screw pump can transport all kinds of mixed impurity containing gas and solid particles or fibers of the media, but also transport all kinds of corrosive substances.