walling piece meaning in English
护壁板板件
Examples
- Gas even store in coal seam , and outstanding on rock wall piece which is destroyed by mining , somining , so it is a typical geological science question to prevent the gas accident of the colliery from occurring
瓦斯不均匀地的贮存在煤层中，突出于采动破坏的岩壁段，防止煤矿瓦斯事故是一个典型的地学问题。