Assertion: ballpoint pen's tip | /r/HasProperty | a spring- or screw-mechanism
Facets:
value: usually
type: DEGREE
Source sentences:
text: The simplest types of ballpoint pens are disposable and have a cap to cover the tip when the pen is not in use, or a mechanism for retracting the tip, which varies between manufacturers but is usually a spring- or screw-mechanism.
text: The simplest types of ballpoint pens are disposable and have a cap to cover the tip when the pen is not in use, or a mechanism for retracting the tip, which varies between manufacturers but is usually a spring- or screw-mechanism.