Assertion: copper tube | /r/Synonym | refer
Facets:
value: sometimes
type: TEMPORAL
Source sentences:
text: Copper tube used for air conditioning and refrigeration applications in the field (sometimes called "refer" or "ACR" tube) is an almost pure copper material meeting the requirements of ASTM B 280 - Standard Specification for Seamless Copper Tube for Air Conditioning and Refrigeration Field Service.