Assertion: neptunium's mass | /r/HasProperty | maintained in the range
Facets:
Source sentences:
text: The method of claim 1 wherein in step (a) a temperature gradient is maintained across said sodium fluoride mass in the direction of the gas flow, the temperature in a first portion of said mass being maintained in the range of 150 to C. and the temperature in a second portion of said mass being maintained in the range of to 200 C.