Assertion: valve | /r/HasProperty | opened operation
Facets:
value: normally
type: DEGREE
Source sentences:
text: Also, in order to'provide a single basic unit whichfcanbe utilized in andfor' a largenumber of uses;- his desirable that a valve be provided which consists of a single simple basic unit which is capable ofbeing either normally opened or normally closed operation merely by changing the connections applied t6 the valve.