During the 1960s and 1970s, as growth in profit became more difficult to achieve due to increased competition, mainly from the Japanese, the industry turned to efficient production methods in order to create a competitive advantage.
在二十世纪60年代和70年代，由于竞争日益激烈，（主要来自于日本），这个工业变得难以完成赢利的增长，而转向利用有效的生产方式来创立竞争优势。
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