通过以下命令查看主控板是否已经启动NT自动保护？
RTRV-EQPT::ALL;
/* RTRV-EQPT::ALL */
"P-OLT:LEEU,LEEU::,"
"RACK-1:ALTR-E,ALTR-E::,"
"SHELF-1-1:OLTS-M,OLTS-M:SHELFCLASS=MAINETHERNET:IS-NR,"
"ACU-1-1:AACU-C,AACU-C::IS-NR,"
"NTA:EHNT-B,EHNT-B::IS-NR,"
"NTB:EHNT-B,EHNT-B::IS-STBY,"