Typewriter with writing visible types and Lever System, which consists of Type Lever, Middle Lever and drawbar.

• 1. 中间杠杆，中间杠杆壳体及其制造方法 [P] . 中国专利： CN109882260A . 2019-06-14
• 2. 用于梭口机或运动传动系统的轴承，包括这种轴承的综框运动杠杆和包括这种杠杆或轴承的梭口机 [P] . 中国专利： CN112813556A . 2021-05-18
• 3. Bearing of the rolling-type for the storage of levers, such as, for example, types levers in typewriters and other machines of this type [P] . 德国专利： DE905211C . 1954-03-01

  机译： 滚动轴承，用于存放杠杆，例如打字机和其他此类机器中的杠杆类型

• 4. Auxiliary device for the bending of the types the lever and the application of the types on the types lever of typewriters [P] . 德国专利： DE687973C . 1940-02-09

  机译： 打字杆弯曲的辅助装置以及打字机在打字杆上的应用

• 5. A Method of and Device for Adjusting the Type Levers and for Soldering Type to the Type Levers of Typewriters. [P] . 英国专利： GB190522447A . 1906-03-29

  机译： 一种用于调节打字机的杠杆并将其焊接至打字机的杠杆的方法和装置。

• 1. A new lever-type variable friction damper for freight bogies used in heavy haul railway [J] . Ximing Xu, Maohai Fu, Zhaoxia Xu, 现代交通学报（英文版） . 2016,第003期
• 2. A new lever-type variable friction damper for freight bogies used in heavy haul railway [J] . Ximing Xu, Maohai Fu, Zhaoxia Xu, 现代交通学报：英文版 . 2016,第003期
• 3. Hybrid Kalman and unscented Kalman filters for INS/GPS integrated system considering constant lever arm effect [J] . 常国宾, 柳明 中南大学学报（英文版） . 2015,第002期
• 4. Leakage-Type Adaptive Robust control for Nonlinear Bulldozer Link Lever System [C] . Chenming Li, Shengchao Zhen, Hao Sun, IEEE International Conference on Mechatronics, Robotics and Automation . 2018
• 5. A Pedagogy of Hope: Levers of Change in Transformative Place-Based Learning Systems [D] . Heaton, Michelle G. 2020
• 6. The structure of the Type III secretion system export gate with CdsO an ATPase lever arm [O] . Jaime L. Jensen, Shavait Yamini, Arne Rietsch, 2020
• 7. Improved Linear Active Disturbance Rejection Control for Lever-Type Electric Erection System with Varying Loads and Low-Resolution Encoder [O] . Hailong Niu, Qinhe Gao, Zhihao Liu, 2019

• 1. ADJUSTABLE LEVER-TYPE ACTIVE TUNED MASS DAMPER: A NEW ATMD MODEL [J] . LiChunxiang ZhangLiqing . 固体力学学报：英文版 . 2004,第1期
• 2. Hybrid Kalman and unscented Kalman filters for INS/GPS integrated system considering constant lever arm effect [J] . 常国宾 ,柳明 . 中南大学学报 . 2015,第002期
• 3. 杠杆四球摩擦试验机杠杆系统误差分析 [C] . 李亚琭 ,袁亚飞 ,刘民 . 第二届“21世纪”试验技术与试验机研讨会 . 2008
• 4. 结构性去杠杆中居民杠杆的研究--基于系统性金融风险角度分析 [A] . 黄武 . 2020