单付现值因子
single payment compound-amount factor
当地功率峰值因子
local power peaking factor
等额多次现值因子
uniform series compound amount factor
地震强度因子M_f值
Seismic magnitude factor M_f-value
间歇单付现值因子
discrete single payment present worth factor
间歇统一系列现现值因子
discrete uniform-series present worth factor
间歇统一系列现值因子
discrete uniform-series present worth factor