| 378 / | HD | X-RAY OR GAMMA RAY SYSTEMS OR DEVICES |
| 1 | DF | SPECIFIC APPLICATION {14} |
| 70 | DF | .~ Diffraction, reflection, or scattering analysis {3} |
| 71 | DF | .~.~ Diffractometry {3} |
| 73 | | .~.~.~ Crystalography {5} |
| 74 | DF | .~.~.~.~> Topography |
| 75 | DF | .~.~.~.~> Powder technique |
| 76 | DF | .~.~.~.~> Back reflection |
| 77 | DF | .~.~.~.~> Precession |
| 78 | DF | .~.~.~.~> Piezoelectric crystal |