叶片角度调节机构有机械调节和液压调节两种。
Blade Angle adjusting mechanism to adjust and hydraulic machinery have two types of regulation.
拖拉机液压悬挂机组阻力调节系统，由于机构环节较多，内部信号传递复杂，应用数学分析方法研究十分繁琐。
Quite overelaborate is the study of resistance-adjusting system in the tractor hydraulic suspension system with mathematical analysis due to its complicated mechanism and internal signal transmission.
液压随动系统是一种放大机构，也是一种自动调节系统。
Hydraulic automatic system is a kind of enlarge mechanism, it is also an auto-regulator system.
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