{HEAD ~ The mixed blowing agents} are particularly characterized as mixtures of dichlorodifluoromethane and {TAIL ~ at least one fluorocarbon constituent A}, as defined 
{ HEAD ~ The mixed blowing agents } are particularly characterized as mixtures of dichlorodifluoromethane and { TAIL ~ at least one fluorocarbon constituent A } , as defined
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH