Assertion: nitrogen dioxide's gas | /r/HasProperty | prevented
Facets:
value: from entering the weld area
type: TRANSITIVE-OBJECT
value: effectively
type: MANNER
Source sentences:
text: Finally, because atmospheric movements can cause the dispersion of the shielding gas around the weld, welding processes that require shielding gases are often only done indoors, where the environment is stable and atmospheric gases can be effectively prevented from entering the weld area.