https://jp.mathworks.com/help/rtw/ref/systemterminate.html
System Terminate - Specify external system termination code - Simulink
For a model or nonvirtual subsystem that includes the System Terminate block and a block that uses a SystemTerminate function, the code generator adds external...
external terminationsystemterminatespecifycode
https://www.oboindia.com/en-in/products/external-lightning-protection/air-termination-rods
Air-termination rods - External lightning protection | OBO
lightning protectionairterminationrodsexternal