| 摘要 |
A portico furnace comprises a number of porticos ( 1 ), which are arranged parallel to one another and which define the spans of the furnace, and supports ( 2, 6 ) that are attached to said porticos ( 1 ), between which are positioned interjoists ( 3 ) that constitute the walls of the furnace. At least some of the interjoists ( 3 ) consist of a chimney block ( 4 ) with an axis that is parallel to said supports ( 2, 6 ).
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