This is a tray or shallow box where you put your homework each night until you are ready to do it.
每晚你把家庭作业放进这个文件盘或浅盒子里，准备好要做作业的时候再拿出来。
When stamping the unflanged shallow box type parts, removing unnecessary material is advantageous to the stamping forming.
冲压无法兰边浅盒制件时，挖去多余材料有利于制件成形。
When stamping the unflanged shallow box type parts, removing unnecessary material is advantageous to the stamping forming.
冲压无法兰边浅盒制件时，挖去多余材料有利于制件成形。
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