People behind this book Writers Dao Ngoc Anh Bui Thi Mo Editors Nguyen Thi Thanh Huyen Bui Anh Tuan Bui Huy Thang Designer Ho Huy Tung Luu Minh Son Proofreader Sandra Newt…
Introduction to Contact Chapter Seven 7. Introduction to contact What is contact? When two separate surfaces touch each other such that they become mutually tangent, they…