Assertion: working distance | /r/HasProperty | necessary
Facets:
value: for many applications
type: PURPOSE
value: often
type: DEGREE
Source sentences:
text: For many applications a long free working distance is highly desirable (and often necessary), and specialized objectives are designed for such use despite the difficulty involved in achieving large numerical apertures and the necessary degree of correction for optical aberrations.
text: For many applications a long free working distance is highly desirable (and often necessary), and specialized objectives are designed for such use despite the difficulty involved in achieving large numerical apertures and the necessary degree of correction for optical aberrations.