箱子必须用钉子钉住，并且用金属带全面加固。
Cases must be nailed and secured by overall metal strapping.
利用结实的木箱包装是必需的。箱子必须用钉子钉住，并且用金属带全面加固。
Packing in sturdy wooden cases is essential. Cases must be nailed and secured by overall metal strapping.
使用结实的木箱包装是必须的。箱子必须用钉子钉住，并且用金属带全面加固。
Packing in sturdy wooden cases is essential. Cases must be nailed and secured by overall metal strapping.
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