A. Removed by acid pickling
B. Hammered into the surface
C. Removed with coarse emery cloth
D. Left as such to protect the surface
Correct Answer: Removed by acid pickling ✔
Last Updated: February 08, 2019
A. Removed by acid pickling
B. Hammered into the surface
C. Removed with coarse emery cloth
D. Left as such to protect the surface
Correct Answer: Removed by acid pickling ✔
Last Updated: February 08, 2019