每一笔暂定金额仅按照工程师的指示全部或部分地使用，并相应地调整合同价格。
Each Provisional Sum shall only be used, in whole or in part, in accordance with the Engineer's instructions, and the Contract Price shall be adjusted accordingly.
每笔暂列金额只应按雇主指示全部或部分地使用，并对合同价格相应进行调整。
Each Provisional Sum shall only be used, in whole or in part, in accordance with the Employer's instructions, and the Contract Price shall be adjusted accordingly.
上述金额仅以那些加上或减去超出有效合同价格的15%的款额为基础。
Such sum shall be based only on the amount by which such additions or deductions shall be in excess of 15 per cent of the Effective Contract Price.
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