control arm操纵臂,驾驶杆,控制臂,操纵杆controln.掌控；控制；管制；克制；操作装置v.控制；支配；掌管；抑制；克制controlled destabilization可控解稳定Control upper - boundary控制上界control technology of dust尘粒控制技术controlling electric clock主控电钟control electrical machine控制电机control of ecological cost生态成本控制control of production cost成本管理controlled cement grouting控制性水泥灌浆control telephone repeater控制电话增音机controlled quantum cloning受控辅助克隆