substitutional impurity atom substitution inertness substitution method substitution reaction substoping substoping-and-caving substractive mixture substratosphere substratospheric substratum substructure subsurface subsurface defect subsurface drain subsurface drainage subsurface excavation subsurface flow subsurface irrigation subsurface process subsurface water |
substitutional impurity atom примесен атом Търсената дума е намерена |