栅格式凹板的修理许前黎，张秀义，苗福明，江玉环（黑龙江省大西江农场）近几年，在检修自走式联合收割机时，我们发现收割机脱谷部分的栅格式凹板横条上平面两边棱角磨损严重，致使脱净率低（特别是收获小麦），影响了收获质量。然而，如果都更换新凹板，将耗费一笔数额... In recent years, overhauling self-propelled combine harvester, we found that the harvester threshing part of the grid recess Plank bar on both sides of the corners of the serious wear and tear, resulting in low removal rate (especially wheat harvest), affecting the quality of harvest. However, if you replace the new concave plate, it will cost an amount ...