Assertion: leaded solder | /r/HasProperty | useful
Facets:
value: in applications like subminiature vacuum tubes
type: OTHER
value: for joining mica windows
type: PURPOSE
Source sentences:
text: As the seals can be performed at much lower temperature than with direct joining of glass parts and without use of flame (using a temperature-controlled kiln or oven), glass solders are useful in applications like subminiature vacuum tubes or for joining mica windows to vacuum tubes and instruments (e.g., Geiger tube).