With automatic beat teeth structure, a new and improved version of pressure-Fanshe devices.

具有自动打齿结构、新型翻折与改进型压导装置。

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With automatic beat teeth structure, automatically decelerates, a new and improved version of pressure-Fanshe devices.

具有自动打齿结构、自动减速、新型翻折与改进型压导装置。

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