SAFETY DEVICE FOR SCAFFOLDS USING A COMMON TWO-LEG LADDER

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  机译： 可调节的两腿梯子稳定装置-具有万向铰链连接的支撑和带有滑靴的连杆

• 4. SHACKLE SEPARATING DEVICE FOR HIGH PLACE CAPABLE OF OBTAINING WORK SAFETY AND OMITTING INSTALLATION OF A LADDER OR A SCAFFOLD [P] . 韩国专利： KR20120138404A . 2012-12-26

  机译： 用于实现工作安全并无需安装梯子或脚手架的高位置的无接缝分离装置

• 5. Scaffold attachment and safety device for ladders [P] . 美国专利： US1881902A . 1932-10-11

  机译： 梯子的脚手架安装和安全装置

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