1 Subjects: “...structure...”

2 Subjects: “...crop planting structure...”

3 Subjects: “...pore structure...”

4 Subjects: “...pore structure...”

5 Subjects: “...salt structures...”

6 Subjects: “...population structure...”

7 “..., turbines, weirs, dams, grade-control structures, and pipelines. Their works are based on three different...”

8 “... give a short but intensive description of the many applications of the basic structure of symmetry...”