Asbestos liner is used in a casting ring to________________?
(A) Facilitate venting of the mold
(B) Retard the heating of the investment
(C) Permit expansion of the world
(D) All of the above
Asbestos liner is used in a casting ring to________________?
(A) Facilitate venting of the mold
(B) Retard the heating of the investment
(C) Permit expansion of the world
(D) All of the above
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