standby UPS备份不间断电源standbyn.备用；待命者adj.备用的；应急的standby letter of credit[经] 备用信用状standby control register备用控制寄存器standby control computer备用控制计算机standby redundancy system备用系统standby protection device后备保护元件standby energy consumption待机能耗standby dispatching system备用调度系统standby operational program备用操作程序standby automation switching备自投standby self- motion switch备自投