Material / equipment,
ice 1. 2. 3. Salt water tank 4. freezer. 5. Insert wooden ice cream
to make
ice to salt ratio is 5: 1, and then turn it on ice. About half of the external tank, then add salt, add ice and salt alternately filled. Until finally culminating with salt Then the timber What are the pieces Dig down to the ice until the tank around to gently prod it to salt and ice together.
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