A. Ion-exchange resins
B. Fountain pen barrels
C. Formica table tops
D. Combs
Correct Answer: Ion-exchange resins ✔
Last Updated: March 08, 2019
A. Ion-exchange resins
B. Fountain pen barrels
C. Formica table tops
D. Combs
Correct Answer: Ion-exchange resins ✔
Last Updated: March 08, 2019