The performance of the water hydraulic directional valve can achieve the level of traditional oil hydraulic directional valve.
研制的纯水换向阀的性能基本达到了现有同类油压换向阀的水平。
2
The utility model can continuously measure the oillevel and the water level of ship rapidly and accurately, and has the indication keeping function and various warning functions.
本实用新型能对船舶的油位、水位进行快速、准确、连续地测量，并具有读数保持及多种报警功能。
3
Waterlevel control is an important problem in design work for oil refining and chemical factory.