穴距是影响水稻播种机精密播种质量的主要因素。
Seed spacing is the key factor of the effects on the quality of precision drilling.
分析了影响气吸式滚筒水稻播种器吸播种性能的因素，研制了气吸式双层滚筒水稻播种器。
The influence factors of the air suction cylinder rice seeder were analyzed on the suction and seed performance in this paper.
据统计，我国水稻播种面积约占全球粮食播种面积的28.9％，总产量居所有粮食作物的首位。
According to Stat. : The planting area of rice in our country occupy 28.9% of it in the world . The overall output occupy primacy in all foodstuff.
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