为与铲式成穴器的结构特点相适应，选择倾斜圆盘勺式玉米精密排种器作为打穴播种机的排种机构。
For the usage of the spade soil opener in a punch planter the precision metering device with declined scoop type disc was selected for maize seeds.
圆盘绕一个通过中心与法线方向倾斜的轴转动。
Circular disk was rotating about an axis tilted from the normal through the center.
在它的一端有一个直径为八毫米的圆盘。这个圆盘可以固定全息胶片，并呈一定角度的倾斜。
At one end it has a disc 8 millimetres wide, which holds the holographic film, tilted at an Angle.
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