双级双峰时效
two-stage double-peak aging
two-stage double peak aging
双级级联单边带
Dual-stage single sideband(DSSB
双级时隔记录
Recording on Two Time Intervals
双级双程结构
two-stage two-pass configuration
双级双速主减速器
two speed double reduction final drive
分级时效
multi-stage ageing
double-stage ageing
Reageing
classify-aging
double stage ageing treatment
classified aging
progressive ageing
Double stage aging
Twice-step ageing method
分级时效处理
interrupted ageing treatment