How to calculate the economic life span of farmmachine has a bearing on economic effect.
农机经济寿命的计算关系到企业的经济效益。
2
The overall design plan of the CAD system is put forward based on structure features of farmmachine panel die.
根据农机覆盖件模具的结构特点，提出了CAD系统的总体设计方案。
3
This paper has been derived general purpose formula for selection of factor of safety, from statistical nature of actual load and statistical nature of load cap-ability for farmmachine.