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1959年秋天,莫斯科区普希金实验林场研究出一种新式林业犂。这种犂构造简单,是由箱形机架组成的,箱形机架是用窄轨的轨条制成的,轨条的前端经焊接而合在一起,其状似楔。在犂身前面的下部,安装了两个楔形刀。遇着细的树根,刀可以把树根割断,便于犂壁翻过翻耕层;当遇着粗的树根时,位于犂铧下面的刀,使犂从土壤里退出来而越过粗根。同时,由于机架是楔形的,犂容易绕过碰着的伐根,不用拖拉机司机关
In the autumn of 1959, Pushkin Experimental Forest Farm in Moscow Region developed a new type of forestry plow. This plow is simple in construction and consists of a box-shaped frame made of narrow-gauge rails, the front ends of which are joined together by welding and resemble a wedge. At the lower front of the plow, two wedge knives were installed. In the case of a thin tree root, the knife cuts the roots of the tree and makes it easier for the plow wall to turn over the tundish. When it encounters a thick root, the knife under the plowshare pushes the plow out of the soil and over the coarse root . At the same time, because the rack is wedge-shaped, the plow easily bypassed the impact of the root, without tractor driver