period singal value calculated by DFT
Carboniferous Period—Permian Period
Demand charge shift from the on-peak period to the off-peak period
middle_period and last_period state_mines
Paleogeng Period-Neogene Period
period shut-down (period trip)
period-to-period value changes
Spring and Autumn period and Warring States period
the Spring and Autumn Period and the Period of War
accurately calculated present value
age calculated by weeks
annual calculated expense
back-calculated modulus
Burning rate-calculated
calcuated nornal folw coefficient