我厂生产蒸养煤灰砖,有29个蒸汽养护室,共计58樘养护室门。过去,这些都是木制门樘、木制门扇(铁皮包面,内充保温材料)。自一九六九年投产使用以来,这种木制养护门,因经常受干湿交替作用,容易腐烂,每半年就要维修更换一次,耗用大量木材。最近,我们参照兄弟单位的经验,着 Our factory produces steamed fly ash bricks, with 29 steam curing rooms and a total of 58 nursing room doors. In the past, these were wooden lintels, wooden lintels (metal linings, inner insulation materials). Since it was put into production in 1969, this kind of wooden conservation door, because it is often affected by dry and wet alternation, is perishable and needs to be replaced and replaced every six months, which consumes a lot of wood. Recently, we refer to the experience of brothers and