control rod drive shaft
control rod drive shaft unlatching tool
control rod drive chamber
control rod drive housing
control rod drive mechanism
控制棒驱动机构
操纵杆驱动机构
控制棒传动机构
驱动机构
control rod drive mechanism coil
control rod drive mechanism cooling shroud
control rod drive mechanism nozzle leakage monitoring system
control rod drive mechanism protective cover
control rod drive package
control rod drive penetration
control rod drive system
control rod shaft assembly
absorber rod control gas
absorber-type control rod