求翻译：长协矿的好处是能够保证供应量，我们工厂用料的计划就比较制定。一旦签好合同，大矿山无论价格高低都会供货的。不会出现由于价格升高而矿山不以原来的价格出售。是什么意思？

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long association of the mine is good, we are able to supply the plant with a plan to develop. Once you sign the contract, the mine regardless of the price level, will supply. There will be no increase in price because mine is not in the original sale price.

长协矿的好处是能够保证供应量，我们工厂用料的计划就比较制定。Once signs the contract, regardless of the big mine the price height can supply goods.But cannot appear as a result of the price ascension the mine not by the original price sell.

Benefits of long mine is able to guarantee the supply, our factory materials plan is more developed. Once you have checked your contract, mine supply of both high and low prices. Mine due to a price rise is not does not appear in the original prices.

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