1 Subjects: “...building materials trade...”

2 Subjects: “...Material flow planning...”

3 Subjects: “...material flows...”

4 Subjects: “...mono-material...”

5 Subjects: “...banana tissue culture planting material...”

6 Subjects: “...material handling systems...”

7 Subjects: “...material flow handling...”

8 Subjects: “...purification materials...”

9 Subjects: “...building material distributors...”

10 Subjects: “...eco-friendly sound-absorbing material...”

11 Subjects: “...material requirements planning...”

12 Subjects: “...hazardous materials...”

13 Subjects: “...average material removal rate (AMRR)...”