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 | graph BT
 subgraph ELE
 ELE_C((碳C))
 ELE_Mn((锰Mn))
 ELE_Co((钴Co))
 ELE_Pb((铅Pb))
 ELE_Sn((锡Sn))
 ELE_Bi((铋Bi))
 ELE_Gold((Gold))
 end
 
 subgraph COM
 COM_Cable(Cable)
 COM_Fuse(Fuse)
 COM_Glass(Glass)
 end
 
 subgraph COM2
 COM2_Bearing(Bearing)
 COM2_Camer(Camer)
 COM2_Sensor(Sensor)
 COM2_Laser(Laser)
 COM2_Circuit(Circuit)
 end
 
 
 
 
 ELE_C -- 5 --> COM_Cable
 
 ELE_Sn -- 5 --> COM_Fuse
 
 
 
 ELE_Co -- 5 --> COM2_Bearing
 
 COM_Fuse -- 2 --> COM2_Bearing
 
 ELE_Bi  -- 10 --> COM_Glass
 
 ELE_Bi  -- 5 --> COM2_Circuit
 COM_Cable  -- 10 --> COM2_Circuit
 ELE_Pb  -- 5 --> COM2_Circuit
 
 COM_Cable -- 2 --> COM2_Sensor
 ELE_C -- 10 --> COM2_Sensor
 
 COM_Glass(Glass) -- 1 --> COM2_Camer
 ELE_Mn -- 5 --> COM2_Camer
 
 ELE_Sn -- 10 --> COM2_Laser
 ELE_Sn -- 1 --> COM2_Laser
 ELE_Gold -- 5 --> COM2_Laser
 
 
 
 
 |