请教英译中
On receiving an order from the Purchaser to vary the works the Builder shall immediately proceed to obtain the approval of L.R and only upon such approval carry out such variation and/or notwithstanding that the Builder may not agree to the price of such variation and/or the extension of time (if any) granted by the Purchaser but the Builder may giving written notice to the Purchaser within seven (7) days of receiving the Purchaser’s order inform the Purchaser that it does not agree with the Purchaser’s determination of the price of such variation and/or the extension of time granted. 谢谢！
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