student's chalk slate or small chalkboard from yesteryear. use as a graphic or border wood grain is semi-freehand
學生的粉筆板岩
border、Borders、chalk、chalk board、chalkboard、chalk slate、classroom、Clipart I love、frame、presentation、presentation graphic、retro、school、Set 2B、slate、student
邊界、國界、粉筆、粉筆板、黑板、粉筆板岩、課堂、我愛的剪貼畫、幀、介紹、演示圖形、復古、學校、設置2B、石板、學生
資料來源：openclipart ( https://openclipart.org/ )