between +420 and +589) as a device to allow several farmers to work at the same quern .
译文：到南朝（420-589年）时，又加
了连杆，使几个人能共同推动一盘人力磨。
between +420 and +589) as a device to allow several farmers to work at the same quern .
译文：到南朝（420-589年）时，又加了连杆，使几个人能共同推动一盘人力磨。
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不代表本软件的观点；若发现问题，欢迎向我们指正。
