求翻译：当模制品在模具型腔里完全冷却后，就必须把它弹出来。这得靠劫针、劫套、卸料板、环剥钳和压缩空气这些或单独地或一起地使用来完成。这个过程中最常见的问题是新铸出的模具往往带有弹射力，由于没有精确的方法来计算它所需的弹射力，所以全得靠经验来把握。是什么意思？

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When the products in the die cavity completely cooled, must give it up. This pin had to rely on robberies, robbery, discharging plate, ring wire stripping pliers and compressed air, or to use individually or together to complete. This process is the most common problems in new casting molds often wi