some salesorders module field are not displayed in output pdf/mail based on customized inventory template

some salesorders module field are not displayed in output pdf/mail based on customized inventory template

I have this inventory template (the red fields are not displayed, some of them are there only for debug purposes)

and the output preview is like this:

So how is easy to see all product related fields retrieved from SalesOrders table are not displayed

Any suggestion, please!