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1·Tillage location test and its cooperative test in the wheat-maize double cropping field showed that the best time limit for applying disc plough was one or two years.

在小麦、玉米一年两熟制农田上，进行耕法定位及配合试验，试验表明，耙茬少耕的有效年限为1 ~ 2年。

2·A design method on level swing beam disc plough was put forward by designing and calculating of level swing beam mechanism, side force balance mechanism and overall parameters.

通过对水平摆式圆盘犁的水平机构、机组侧向力平衡机构、机组整体参数的设计计算，提出水平摆式圆盘犁的设计方法。

3·The utility model provides a ring-type workbench for assembling and manufacturing a coal plough disc or a coal unloading disc of a coal unloader, and belongs to tooling for processing machine parts.

环式卸煤机犁煤盘、卸煤盘的拼装制作工作台，属于机械零部件加工的工 装。