Manufacturing groups are particularly upbeat,with three times as many companies expecting increased activity for every o

如果将句子中省略的部分加完整为：
Manufacturing groups are particularly upbeat,with three times as many companies expecting increased activity (as) for every one that fears （that）activity will fall.
Manufacturing groups 是主语.are 是系动词,particularly upbeat是表语.意思是 有上涨趋势,而最后的 fall 有减少的意思,
主句是Manufacturing groups are particularly upbeat,with three times as many companies (as) for everyone
后面是 with引导的比较状语,是 companies expecting increased activity 与 every one that fears activity will fall 比较,前者是后者的3倍.expecting increased activity 现在分词作定语修饰 companies,其中 increased 是过去分词形容词用法,修饰 activity
everyone that fears activity will fall 其中 that fears （that）activity will fall 为定语从句,由于从句主语为everyone （与修饰内容相同）所以省略,fears 为从句谓语动词,activity will fall 宾语从句,为 fears 害怕的内容.
整句意思是：
制造业集团尤其乐观（尤其有上涨的趋势）,其中认为会增加活动的公司是所有害怕活动会减少的公司数量的3倍.