简单介绍了液压上紧及其优点,分析比较了两种传统液压上紧工具与新型液压上紧工具的结构、运行原理,指出了传统液压上紧工具存在的缺点,阐明了新型液压上紧工具的优越性。 The hydraulic tightening and its advantages are briefly introduced. The structure and operating principle of two traditional hydraulic tightening tools and the new hydraulic tightening tools are analyzed and compared. The shortcomings of the traditional hydraulic tightening tools are pointed out. The new hydraulic tightening tools The superiority.