rapping hole meaning in Chinese

敲模孔

Rapid repairing mass for converter ismade of electro baked magnesite and high - quality synthetic sandand manufactured by adding high fluidity recarburizer ( beveloped by ourselves ) as addition agent withspecial technique . lt has the characteristics of well fluidity , well rapid fluidityand rpid sintering etc . it is applied to hot patching of large area before or after the converter as rapping hole patching and other parts for converter
转炉快速补炉料是以电熔镁砂和优质合成砂为主要原料，配以自行研制的高流动性的增碳剂为添加剂，以特殊工艺生产制成，具有流动性好、快速烧结等特点，适合于转炉的前后大面的热修补及出钢口等部位的修补