那些没有使用“珍妮机”的纺纱工人不但产量低，而且棉纱又卖不出好价钱。

Those who do not use "Jenny machine" spinning workers with low output, but also the inability to sell at a good price of cotton yarn.

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纺纱厂的老板们在寻找一种方法来取代没有熟练技术的工人，而且需要一种不需要纺纱工人操作的自动纺纱机。

The mill owners were looking for a way to replace the workers with unskilled labor, and needed an automatic mule, which did not need to be controlled by the spinner.

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