When boring, rock that has a TSF of 8000 is considered to have hardness classification ______.

When boring, rock that has a TSF of 8000 is considered to have hardness classification ______.

0 Likes
en English
ar Arabiczh-CN Chinese (Simplified)nl Dutchen Englishfr Frenchde Germanit Italianpt Portugueseru Russianes Spanish