Determine three focuses on exactly the same region on the copper shaft furnace just after 2½ yrs of operation with the enhanced silicon carbide bricks (apart from the destroyed place in the best portion from the photograph, which was where the typical silicon carbide bricks were used for comparison into https://www.facebook.com/permalink.php?story_fbid=pfbid0h4QJMwKx3aakby75jMuYHhcFNff9wYmvg8VwHDtd5gGqJBKiFqtZbeRj5off8T7rl&id=61562415773754&__cft__[0]=AZWvBaUb3XdyEBjsDtjB7TJZIA4reqzAlFMLAizyo2ySB6P_-WEAP0ZcufAO5Ze_w0dst-k-urN6cw4Yr-8K6ufQs3weUK6MIzJP9MluvuNt3-Uem5YmXNEcf7n_5rscXeUtOQx4o7bvtKR_wrnJy8sBEjBf_KsGTkJvroH8Q1oaHBnzyR-0o1bsNqkIG-rkNCikAqUpcIIMINJWaDwHos8e&__tn__=%2CO%2CP-R