planting machine
1.Mechanical equipment of planting industry: soil tillage machine, planter, harvester, machines working on threshing grounds, corn-straw &stubble breaking land-returning machine, complete equipment for factory-sprouted seedlings cultivation and planting of rice, maize and cotton and so on, cotton seedling machines and facilities, complete equipment of agriculture, cultivation techniques of farm crops and new varieties as well as prevention and cure of disease and insect pest.
6.The second section is concerned in making design explanation of theinner cam controlling mechanism of planting crank for the rotary-vertical path type engine-dri-ven rice transplanter of the united model in 1978.By means of fields experiment and the design theory they will explain the united model ismaintained and developed the advantages of the original machine,thereby the design methodhas further been improved.

