The Engineer may, if in his opinion it is necessary or desirable, issue an instruction that any varied work shall be executed on a day-work basis.
如果工程师认为必要或可行时，可以发出指示，规定在计日的基础上实施任何变更工作。
The Engineer may, if in his opinion it is necessary or desirable, issue an instruction that any varied work shall be executed on a day-work basis.
如果工程师认为必要或可行时，可以发出指示，规定在计日的基础上实施任何变更工作。
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