Hydraulics is a technological science which is intervenient basic science and special science.It researches the rules of liquid balancing and moving, and using the rules in engineering.

• 水力学是一门介于基础科学和专业技术之间的技术科学，其研究对象是以水为代表的液体的平衡和机械运动的规律及其在工程中的应用。