Ontario has registered 30,000 mining claims in an area west of James Bay nicknamed the "Ring of Fire", where chromite (used for stainless steel) was found in 2006.
Ontario has registered 30, 000 mining claims in an area west of James Bay nicknamed the "Ring of Fire", where chromite (used for stainless steel) was found in 2006.
The design principle and the structure of the steel platform for the construction of Hangzhou Bay Bridge are introduced and the major problems and points of attention are pointed out.