To prevent damage from repeated freeze-thaw cycles, the bottom of the foundation must be below the frost line.

为了防止反复冰冻解冻循环的损害，地基的底部必须在霜线以下（此处的土壤不受地表冰冻的影响）。

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When installing the automatic waterer, make sure that the water pipes to the unit are below the frost line.

当安装饮水器时，务必确保水管到装置低于冻结线。

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When installing the automatic waterer, make sure that the water pipes to the unit are below the frost line.

当安装饮水器时，务必确保水管到装置低于冻结线。

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