LTM Export Certificate (definition, cert and key) to import to another LTM

Simply export them (either file or text) from the GUI
System  ››  Certificate Management : Traffic Certificate Management : SSL Certificate ListSelect the name
It will send you to the certificate info
Click the "export" tab at the bottom
There you will see the text you can copy, or you can choose the download option
Them, go back to the previous screen and select the "Key" tab at the top
This takes you to the key info and you can see the "export" tab at the bottom, just as you had for the certificate