accountant in the background of computer age
geological background system
the background database
the background of the formation of Dahala Junshan volcanic rock
The background value of Cs-137
Application of the System
configuration of the system
dynamic energy efficiency ratio of the system
efficiency of the system
electricity synthesizes to protect the system
establishment of the system
Grey system the rate of connection
Implementation of the System
Index map of the system
input on the system construction
integration of the system