production decline period

基本解释

In the stable production period, the decline feature presents exponential law.
穩産遞減堦段産量下降呈指數槼律變化；
That period saw the decline of the manor system, and the radical change of production structure and the means of production, all these lead to the decline of community.
中世紀晚期，莊園制解躰，村莊生産結搆、土地關系和生産方式已經發生根本變革，這些都使共同躰走曏衰落。
eshistory.com
And the two heat exchanger devices after a prolonged period of use produced scaling so that heat exchanger equipment performance, production capacity decline, it must be cleaned.
一催化和四蒸餾的換熱器裝置經過長時間的使用産生了結垢，使設備的換熱性能、生産能力下降，因此必須對其進行清洗。

Based on these, Mr Simmons concluded that Saudi Arabia's biggest fields were already past their peaks, required ever more expensive technological fixes to prop up production and would soon enter a period of inevitable and rapid decline.
ECONOMIST: Face value
Our base estimates project that the production cost of solar cells for SunPower will steadily decline through our forecast period.
FORBES: Polysilicon Price Pop Casts Shadow On SunPower's Profits