No modification of this Contract shall be valid unless the same is agreed in writing by the Parties hereto and issued as an amendment to the Contract.
对本合同的任何修改都将无效，除非合同有关各方以书面的形式一致同意，并颁布作为合同的修改本。
Thee stipulations in the relevant credit should strictly confirm to the terms stated in the contract in order to avoid subsequent amendment.
有关信用证上的规定必须与合同上的条款完全一致，这样，才可避免日后被修订。 。
Any amendment of the contract shall come to force only after the written agreement is signed by both of us.
合同的任何修改都应该经过我们双方书面同意以后方可生效。
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