未经安士澳明确的书面同意，买方不可以修改、更换、否认或放弃本协议中的任何条款和条件。

Buyer may not modify, change, renounce or waive any term or condition hereof without Ellsworth's express written consent.

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未经必升能明确的书面同意，买方不可以修改、更换、否认或放弃本协议中的任何条款和条件。

Buyer may not modify, change, renounce or waive any term or condition hereof without Fisnar's express written consent.

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