Hello, castigous.
Each product in AbanteCart have a lot of configuration settings, options, option values, half of the configs are multilanguage supported that's why if export everything about product you will see so many columns.
Please see attached very minimum working Tab delimeted CSV file with only 18 columns allowing you to insert product with basic settings like name, weight, price, description, blurb, category id to assign, store id, tax class, quantity etc
Please note it is Example!