A design of aspirating precision seeder for sowing rice in cupulate compartment tray 气吸式水稻钵育秧盘精量播种机的设计
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A study on raising and transplanting technique for rice growing in cupulate compartment tray of plant material 水稻植质钵育栽植技术的探讨
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According to the general plant of pkpm , the development of the pre - process part of cad system for tower structure has been done with object - oriented program language c + + in cfg graphic supporting system . the cad system is composed of the model - processed work of six kinds of towerbody structure , four kinds of towerboard , cupulate towerhead and extensive towerhead 依照pkpm的总体布局要求，本工作采用设计语言c + + ，在cfg图形平台上进行塔架结构计算机辅助设计前处理的开发，完成了六种塔身结构、四种横隔形式、酒杯型塔头和扩展干字型塔头的处理工作，这些都是最常用的典型结构。
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