sentences: unwind chemicals deposition
docs: chemical_vapor_deposition is thin_film_deposition. unprocessed_uranium is beta_emitter. unwinding_dna_molecule is chemical_reaction. ultrahigh_vacuum_cvd is chemical_vapor_deposition. thin_film_vacuum_deposition is vacuum_deposition. deposition is accretion. physical_vapor_deposition is thin_film_vacuum_deposition. unwinding_dna_molecule is uncoiling. electrochemical_deposition is wafer_deposition.