投资效果分析指标 (一)净现值(Net Present Value,NP 计算公式: 现金流入现值和现金流出现值和 判断准则:项目可接受; 项目不可接受

(一)国外喷灌的发展状况 1.喷灌面积大 2.喷灌面积占灌溉面积的比重大 3.喷灌面积发展速度快

The Lathe And Its Construction A lathe is a machine tool used primarily for producing surfaces of revolution and flat edges. Based on their purpose, construction, number of tools that can simultaneously be mounted and degree of automation, lathes-or, more accurately, lathe-type machine tools-can be classified as follows:

目标:筛选微生物最适生长及产物形成的 营养条件和培养条件,确定特定产物发酵 的工艺参数

中国农业大学：《发酵工程学 Fermentation Engineering》课程教学资源（实验指导）实验二 微生物培养基优化

Product quality is al ways a matter of prime importance in manufacturing. It should be given parameter the highest priority in process planning. The quality of a machined part can be expressed in coordination geometrical parameters( dimension

There are two basic methods of generating process manufacturing gear teeth,the generating process and the forming forming process process. When a gear tooth is generated, the workpiece and the grinding cutting or grinding tool are in continuous mesh and the tooth form is mesh

conical roller Bearings With rolling Contact In bearings with rolling contact, the shaft is needle idirectly or indirectly supported by rolling elements, cylindrical such as balls, cylindrical or conical rollers, orroller needles (i.e, ylindrical rollers with a high

transmission or many years a hydraulic system was plumbing considered the result of plumbing together number of components. Also, a hydraulic component system has been considered merely the of power for control servos. Each of these servo 1aB concepts can lead to basic errors

项目可行性研究的内容 1、投资机会究 2、初步可行性研究 3、详细可行性研究 4、投资决策 5、项目实施 6、项目后评估