This paper proposed a kind of cylindric tube air-suction seedmetering device suitable for corn precision seeder, introduced the structure and the principle.
提出了一种适用于玉米精播机的圆管式气吸排种装置，介绍了结构和原理。
2
Aiming at the meeting the request of wheat precision seeding, the traditional precision seedmetering device was improved, and the range of some parts parameter were defined.
为适应小麦精密播种的要求，对传统气吸式精密排种器进行改进，确定了各部件参数的取值范围。
3
Based on measuring, statistics and research on configurational characteristics of garlic clove, the key component of rotary garlic single-clove directional seedmetering device is designed.