In optical component industry, there are a variety of products, which can be divided into dozens of types.
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In optical component industry, there are a variety of products, which can be divided into dozens of types.
光电子器件行业产品种类繁多，仅大的产品类别就有几十种。
In optical component industry, products are still handmade and machined, and a large number of skilled workers are needed, so China is the largest optical component production base in the world.
光电子行业还是半手工半自动产品，需要较多技术工人，因此中国是全球最大的光电子产品基地。
After technology stock bubble collapsed in 2001, optical component industry plummeted. But, it regained from 2004. The gross profit margin increased year by year, even peaked in 2007 and 2008.
光电子行业自2001年科技股泡沫崩溃后一落千丈，不过从2004年就逐渐恢复元气，毛利率逐年攀升，在2007、2008年达到巅峰。
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