(A) Using asbestos linear
(B) Placing the sprue at least one quarter inch away form the end of casting ring
(C) Preventing rapid heating the investment in burnout oven
(D) Using a short and wide sprue
(A) Using asbestos linear
(B) Placing the sprue at least one quarter inch away form the end of casting ring
(C) Preventing rapid heating the investment in burnout oven
(D) Using a short and wide sprue
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