合理性能 meaning in English

rational behavior

This machine has reliable performance , high efficiency and low cost , and is
该机结构合理性能可靠，是实现高效率低成本的机械设备。
And marble into sheet . the structure of this machine is reasonable and its performance is
该机结构合理性能可靠，是实现主效率低成本的机械设备。
Structure of the machine is reasonable and its performance is reliable . it is ideal equipment for
本机结构合理性能可靠，是石材加工行实现高效率低成本的理想设备。