The diamond reamer has such advantages as higher machining precision, minimumsurface roughness, higher efficiency and longer service life.
金刚石铰刀具有加工精度高、表面粗糙度小、加工效率高、寿命长等优点,能很好满足高精度内孔加工的要求。
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So, for example, we were talking about a threshold frequency as in a minimum frequency of light that you need in order to eject an electron from a metal surface.