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| Russian | English |
| шаг антенной решётки | antenna array pitch |
| шаг дифракционной решётки | diffraction grating spacing |
| шаг кристаллической решётки | spacing of the lattice (An X ray beam that impinges on ordered crystalline lattices undergoes constructive and destructive interference, which depends on the spacing of the lattice Firiel) |