active maintenance downtime
active maintenance time
active preventive maintenance time
active-active transient mode-locking technology
active or semi-active suspension
engineering district；maintenance of way section；track division；track district；track maintenance division
2nd-Order Active Filter
302-A special active carbon for removing red-lustre
3-phase 4-wire active power filter
5th seismically active period
9-anthracene active substitute compounds
a combination solution of the active and passive method to reduce noise
A New Design of Hybrid Active Power Filter
a new round of active fiscal policy
a rotor-active magnetic bearing system
AAM Active Appearance Model