Sand castingSand casting, the oldest casting process, consists of

A、placingapatternhavingtheshapeofthedesiredcastinginsandtomakeanimprint(印记)
B、incorporatingagatingsystem
C、fillingtheresultingcavitywithmoltenmetal
D、allowingthemetaltocooluntilitsolidifies
E、breakingawaythesandmold
F、removingthecasting