苗床松土器（韩士成，张英革，白英岭，王安林）为改变沿用的利用松土刀和松土耙疏松苗床的作业方式，朗乡林业局试制了滚动式松土器。该松土器由滚轴、轴、松土齿、轴架、把库和把组成。设计新颖，结构紧凑，使用方便，制作简单，适用性强。适用于针叶或未放叶阔叶苗木的... Seedbed ripper (Han Shicheng, Zhang Yingge, Baiying Ridge, Wang Anlin) to change the use of the use of loose soil cutter and loose soil rake loose seedbed mode of operation, Longxiang Forestry Bureau trial rolling riparian. The ripper consists of a roller, a shaft, a loose tooth, a shaft holder, a handle and a handle. Innovative design, compact structure, easy to use, simple production, applicability. Suitable for needles or leaves without leaves ...