The rate of tarnish and corrosion of class II cast material having VHN 200 is_______________?
(A) 0%
(B) 2 to 3%
(C) 5 to 10%
(D) <1%
The rate of tarnish and corrosion of class II cast material having VHN 200 is_______________?
(A) 0%
(B) 2 to 3%
(C) 5 to 10%
(D) <1%
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