Pulley unit installed in the base. Easy to move. Light weight. occupies little space.
底座装置滑轮，移动方便，体积轻，不占空间。
The utility has simple structure, light weight, and can be easily made and installed.
本实用新型不仅结构简单、重量轻，而且制作容易、安装方便。
The utility has simple structure, light weight, and can be easily made and installed.
本实用新型不仅结构简单、重量轻，而且制作容易、安装方便。
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