凍結防止の水抜き
Antifreeze treatment in winter vacation
1997年12月25日(木)
25.Dec.1997
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| 平均気温が氷点下なので水抜きが必要 it is normal here in sub-zero temperature. | we need to release water preventing pipe from damage. |
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| 平均気温が氷点下なので水抜きが必要 it is normal here in sub-zero temperature. | we need to release water preventing pipe from damage. |