コクヨ／レポート箋B罫A4 4901480074931（20セット）◆罫幅：中横罫（B罫）6mm◆行数：40行◆紙厚：薄口50g／平方メートル◆枚数：50枚上質紙◆Ruled line width: Middle side ruled line (B ruled line) 6mm ◆ linage: 40 ◆ paper thickness: 50 g/square meter of light-seasoned ◆ number of sheets: 50 pieces of fine paper