联系我们联系我们
Slates are metamorphic rocks, most of which were formed millions of years ago and began as clay sediments deposited by water. Widely utilized, slate is mined in a number of locations, including the Rocky Mountains, Maine, Vermont, and Pennsylvania in the United States.
对不起,此内容在您的国家不适用。
您即将被转换到我们的本地网站。