data_try_loop_with_single_quotes

    loop_
    _item_units_conversion.from_code
    _item_units_conversion.to_code
    _item_units_conversion.operator
    _item_units_conversion.factor
###
     centimetres              millimetres              *   1.0E+01
     centimetres              nanometres               *   1.0E+07
     centimetres              angstroms                *   1.0E+08
     centimetres              picometres               *   1.0E+10
     centimetres              femtometres              *   1.0E+13
#
     millimetres              centimetres              *   1.0E-01
     millimetres              nanometres               *   1.0E+06
     millimetres              angstroms                *   1.0E+07
     millimetres              picometres               *   1.0E+09
     millimetres              femtometres              *   1.0E+12
#
     nanometres               centimetres              *   1.0E-07
     nanometres               millimetres              *   1.0E-06
     nanometres               angstroms                *   1.0E+01
     nanometres               picometres               *   1.0E+03
     nanometres               femtometres              *   1.0E+06
#
###
     celsius                  kelvins                  -     273.0
     kelvins                  celsius                  +     273.0
###
     electrons_per_nanometres_cubed
     electrons_per_angstroms_cubed                       *   1.0E+03
     electrons_per_nanometres_cubed
     electrons_per_picometres_cubed                      *   1.0E+09
#
     electrons_per_angstroms_cubed
     electrons_per_nanometres_cubed                      *   1.0E-03
     electrons_per_angstroms_cubed
     electrons_per_picometres_cubed                      *   1.0E+06
#
     electrons_per_picometres_cubed
     electrons_per_nanometres_cubed                      *   1.0E-09

#...
#
