1 Subjects: “...fully mechanized top coal caving mining...”

2 Subjects: “...flight mechanical model...”

3 Subjects: “...mechanical test...”

4 Subjects: “...mediating mechanism...”

5 Subjects: “...dynamic mechanical analysis...”

6 Subjects: “...mechanism...”

7 Subjects: “...mechanism...”

8 Subjects: “...mechanism...”

9 Subjects: “...support mechanisms...”