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

2 Subjects: “...energy efficiency index...”

3 Subjects: “...water-efficient products...”

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

5 Subjects: “...street connectivity and efficiency...”

6 Subjects: “...street connectivity and efficiency...”

7 Subjects: “...energy efficiency...”

8 Subjects: “...efficiency evaluation...”

9 Subjects: “...energy-efficient...”

10 Subjects: “...technical efficiency...”

11 Subjects: “...sustainable development efficiency...”

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

13 Subjects: “...pump efficiency...”

14 Subjects: “...efficiency hypothesis...”

15 Subjects: “...efficiency assessment...”

16 Subjects: “...high efficiency...”

17 Subjects: “...high efficiency...”

18 Subjects: “...high efficiency...”