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deleted 

 Oct 5, 2018
edited by yasbib555  Oct 5, 2018
edited by yasbib555  Oct 5, 2018
edited by yasbib555  Oct 12, 2018
edited by yasbib555  Oct 19, 2018
 #1
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A diagram please ?, or at least a less garbled description of it. 

 Oct 6, 2018
 #2
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Yes what he said! 

Melody  Oct 6, 2018
 #3
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I can't find how to add a file that's an image, soorry about that 

yasbib555  Oct 12, 2018

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