Line or reline furnaces, kilns, boilers and similar installations using refractory or acid-resistant bricks, refractory concretes, plastic refractories and other materials.
使用耐火耐酸砖，耐火混凝土，塑料耐火材料和其它材料，用线标示或重新划线衬炉，窑炉，锅炉和类似装置。
2
Ji 'nan steel housing indoor line laying should try to use a metal tube. The metal pipe shall be firmly grounded or the refractory tube.
济南彩钢板房室内线路铺设时应尽量选用金属管。金属管应牢靠接地或选用耐火资料管。
3
Inclusions in the gray strip defects consist of MgO and trace melilite, which result from MgO-C refractory in slag line.