哪位高手能够看懂第一个"O" 是做什么用的，它下面跟的为什么还是“O”的语句，，请各位指教！！！
A "DB_STC01_Misc".Alarms.Fault_Summary
A "DB_STC01_Manual".X_Axle.Standstill_Electrical
A "DB_STC01_Manual".Y_Axle_1.Standstill_Electrical
A "DB_STC01_Manual".Y_Axle_2.Standstill_Electrical
A "DB_STC01_Manual".Z_Axle.Standstill_Electrical
O
O "DB_STC01_Misc".General.REPulse_Auto_On
O "DB_STC01_Misc".General.REPulse_Semi_On
O "DB_STC01_Misc".General.REPulse_Manual_On
O "DB_STC01_Misc".General.REPulse_Service_On
O "DB_STC01_Misc".General.REPulse_STC_Off