I read the article below and found that multiple 'Read List' operations can be defined in same ECT as needed.
I found it interesting...
My main question is, I use below code to get this List records for any processing on UI..
var ctx = new SP.ClientContext.get_current();
var web = ctx.get_web();
//Platform
var list = web.get_lists().getByTitle('<List Name>');
var query = new SP.CamlQuery();
query.set_viewXml('<View><ViewFields><FieldRef Name="Field1" /><FieldRef Name="Field2" /></ViewFields></View>');
items = list.getItems(query);
ctx.load(items, 'Include(Field1, Field2)');