The application is related to {HEAD ~ electrical devices}, such as {TAIL ~ transformers}, that use paper insulation 
such as
The application is related to { HEAD ~ electrical devices } , such as { TAIL ~ transformers } , that use paper insulation
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH