D uring this period, the sharpest drop in exports to the United States is hole stone products, which is mainly caused by over-supply, low price and the slump of US southern construction industry.

• 这时期，土耳其出口到美国降幅最大的是洞石产品。导致这个状况的原因有洞石的供过于求，低价方针，还有美国南部（洞石最大的销售地）建筑业不景气。