In fact, the filter holder is a convenient alternative to more expensive or awkward optical filter setups.
In fact, the filter holder is a convenient alternative to more expensive or awkward optical filter setups.
事实上，这个滤光片支架可以用于许多更加昂贵的光纤应用中。
In fact, the filter holder is a convenient alternative to more expensive or awkward optical filter setups.
事实上，这个滤光片支架可以用于许多更加昂贵的光纤应用中。