Finally, the flexibility quantity contract is discussed.

最后介绍了数量弹性契约。

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A quantity contract has validity periods and can have cancellation rules.

件。数量合同有有效期，且可以有取消规则。

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The indefinite-delivery, indefinite-quantity contract is potentially worth as much as ＄120 million over five years, company officials said.

这份不定期交付/不定数量（IDIQ）合同为期超过5年，潜在价值1.2亿美元。

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Also, Rio decided to cut production by 15% in July at this smelter so its energy requirements would be less but the company would still end up paying for the higher quantity negotiated in the contract.

FORBES: Rio Tinto's Aluminium Woes Continue