今年 1～ 4月以来 ,部分链条行业生产厂的产品产量统计资料表明 ,我国链条行业工业链条的生产与出口产量的结构正在悄悄发生新的变化。变化之一 :与去年同比 ,不管链条的生产总产量和出口总产量是增长还是下降 ,其中 ,中小规格链条的生产产量和出口产量各自所占总量的比例都在 From January to April this year, statistics on the production of some chain industry production plants show that the structure of the production chain and the export output of the industry chain in China’s chain industry are quietly undergoing new changes. One of the changes: Compared with the same period of last year, regardless of whether the total output of the chain or the total output of the chain is increasing or decreasing, the proportion of the total output of the small and medium-sized chain and the total output of the export chain is