12月21日三氯甲烷产业链指数为103.23，较昨日上升了0.6点，较周期内高点157.64点（2021-10-25）下降了34.52%，较2015年12月23日低点50.61点上涨了103.97%。(注：周期指2011-12-01至今)
产业链指数，是本站基于商品产业链及其各节点商品指数而创建的用于反映整个产业链景气状况的定基指数。
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