What I mean is that one can trade jet aircraft for DVD players with China or Japan, and this in no way requires that workers from the US migrate to China or Japan, or that Japanese or Chinese migrate to the US.
Goods, regardless of how much labor they require, are by their very nature far more portable than people, who have families and arte integral members of the societies to which they belong.
This should be obvious to anyone with a minimal brain by mere observation. Those who do not find it obvious need to leave and find employment in Belgium, Bangalore, Ulan Bator or anywhere else.