A guarantee contract is an ancillary contract of the principal claim-debt contract.

担保合同是主债权债务合同的从合同。

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The validity of any modifications, amendments or ancillary agreements to the sales contract is also subject to written confirmation by WIRTGEN CHINA.

销售合同的任何修正案、修订案或补充协议也需经WIRTGEN CHINA的书面确认方能有效。

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There are many kinds of modes in the power market, such as day-ahead market, real-time market, forward contract market and ancillary services market.

电力市场中存在着日前市场、实时市场、合同市场和辅助服务市场等多种交易方式。

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