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发明专利：电动/气动转辙机安全型控制器,ZL200710302457.8
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Service Invention or Not:no
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发明专利：一种铁路车辆摘挂作业电子感应器及其自动感知方法,ZL201310670835.3
Next One:
发明专利：计算机联锁系统之间的联系电路通信方法,ZL201611220724.2
