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Lifting block 浏览387次

    Lifting tackle is a simple small lifting tool, its structure is simple and easy to use, depending on the methodology used can be divided into fixed pulley and move the pulley, a single lifting tackle to use as a guide pulley, a single can only change the direction of the force, andeffort, such as using two or more only with the use of rope around them together to form the pulley, not only can change the direction of the force, but also the effort. My lifting tackle Series of all underwritten by the people's property, excellent quality lifting tackle

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