Now you see the notches. This makes maintence much easier, compared to fixed egg case, at the same time provide addition spring loaded effect and extending the impact time.

 
  • 这就是那两粗凹粗。这样相对于固定式蛋盒,要打开维护就方便得多,同时间提供了弹性,有助拖长撞击时间。
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