1.种子适应性调整外槽轮式排种器有下排式和上下排式两种类型。下排式排种器只能从槽轮的下方排种。为了适应不同大小的种子。排种盒侧壁上有3个凹槽,可将排种舌固定在三个不同高度的位置,以调整排种间隙。最上面的位置排种间隙最小,用来播种谷子、菜籽等小粒种子;中间位置用来播种小麦、高粱等中粒种子;最 1. Adaptability of seed adjustment outside the tank wheel seed metering device has two types of lower row and lower row type. The next row of seed metering device can only be seeding from below the sheave. In order to adapt to the different size of the seeds. There are three grooves on the side wall of the seed box, which can be fixed at three different height positions to adjust the seed clearance. The top position of the smallest interstitial seeds, used to sow millet, rapeseed and other small seeds; the middle position for sowing wheat, sorghum and other medium-sized seeds; the most