1 Subjects: “...economic efficiency of industrial water use (ECEIW)...”

2 Subjects: “...efficient voter rule...”

3 Subjects: “...energy efficiency...”

4 Subjects: “...OEE-Overall Equipment Efficiency...”

5 Subjects: “...efficiency engines...”

6 Subjects: “...efficiency ranking...”

7 Subjects: “...economic efficiency...”

8 Subjects: “...technical efficiency...”

9 Subjects: “...photosynthetic nitrogen use-efficiency...”

10 Subjects: “...energy efficiency in buildings...”

11 Subjects: “...efficiency...”