削弱的一种状况，其中叶片钢的核心速度比戴钻石段。
Undercutting is a condition in which the steel core of the blade wears faster than the diamond segments.
仍然有许多类型的工作在核心数量可能比个人的核心速度的重要，但。
There are still many types of jobs where the number of cores can be more important than the individual core speed, though.
它们首先通过一个低速的核心，然后通过一个高速的外壳，在它们被输送进周围的海水之前，它们的速度提高了。
First through a low velocity core, and then through a high velocity shell, where their speed is increased before they are transmitted into the surrounding seawater.
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