Unless otherwise agreed upon, initial offers shall be made free of charge.
除非另有约定，最初的报价应当免费提供。
Upon receipt of the above, MCG will replace the unit immediately without charge.
在收到上述文件后，MCG将立即无偿更换被损的电涌防护器。
Upon receipt of the above, MCG will replace the unit immediately without charge.
在收到上述文件后，MCG将立即无偿更换被损的电涌防护器。
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