Assertion: microscope | /r/AtLocation | wide use
Facets:
Source sentences:
text: The Watson "Service" microscope shown here is of a general design developed in the early 1900s, and microscopes of this type are still in wide use.
text: The Watson "Service" microscope shown here is of a general design developed in the early 1900s, and microscopes of this type are still in wide use.