To prevent from heat crack, the choose of aluminum alloy with small crystal temperature range and the use of metal cast model, as well as adoption of gradual solidification style will be effective.
选择有效结晶温度范围小的铝合金、采用金属型铸型以及逐层凝固的冷却方式可以有效消除裂纹。
The electric water heater has the characteristics of effective reduction of the heat energy consumption of hot water in the water outlet pipe, small temperature change range, and the like.
具有能有效地减少出水管中热水的热量损耗，使其温度变化范围小等特点。
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