The Netherlands, Germany, , Norway, Sweden, and others are all nations that have decent military development and production capabilities of their own. All of them export certain military equipment and technology and bring in good money for it..
All of them also, to one degree or another, buy some of the more advanced systems that they cannot develop themselves from the larger tier countries.
A lot of nations fit into that type of category to one extent or another. Heck, the US, Russia, and China all buy, on occasion, certain systems from other providers too.
But let's get back On Topic. This is, after all, the PLAN Yuan and Kilo sub thread.