Also available is a lineup of long-focus reflectors (for air-cooled types only) that irradiate UV light effectively.
也配备能够有效地照射u v光的长焦点型(仅风冷式)反射板。
2
Firstly, a telescope system is made up with a concave lens and a long-focus convex lens, by which the angle of the parallel beam from the collimator can be change.
该方法借助一个焦距较长的凸透镜与被测凹透镜组成无焦系统，可以使准直管出射光束的张角发生改变；
3
Who shift the pendulum and who focus more on their strength, are not only happier, but they are also, on the long run, more successful.