-- All of these lines specify an item stack of one iron plate
{name="iron-plate"}
{name="iron-plate", count=1}
{name="iron-plate", count=1, quality="normal"}

-- This is a stack of 47 copper plates
{name="copper-plate", count=47}

--These are both full stacks of iron plates (for iron-plate, a full stack is 100 plates)
"iron-plate"
{name="iron-plate", count=100}