Assertion: package | /r/HasProperty | sealed
Facets:
value: usually
type: DEGREE
Source sentences:
text: Plastic DIP (PDIP) packages are usually sealed by fusing or cementing the plastic halves around the leads, but a high degree of hermeticity is not achieved because the plastic itself is usually somewhat porous to moisture and the process cannot ensure a good microscopic seal between the leads and the plastic at all points around the perimeter.