Using constantpressure variables plunger pump, output pressure can keep constant and flow varies as per system's demand.
采用恒压变量柱塞泵，输出压力保持恒定，输出流量根据系统需要而变化。
2
Dual linear gradient elution can be performed with two specially made glass container and a high pressureconstant flow pump.
用两个特制的玻璃容器及一台平流泵即可实现二元线性梯度洗提。
3
The article analyzes that the constantpressure variable piston pump equipment allocated on the imported 922e LHD is not suitable for domestic using conditions.