Assertion: tube | /r/HasProperty | evacuated at manufacture
Facets:
value: to about 0.000001 mmhg
type: OTHER
Source sentences:
text: Commercial vacuum tubes are evacuated at manufacture to about 0.000001 mmHg (1.0×10−6 Torr; 130 μPa; 1.3×10−6 mbar; 1.3×10−9 atm).