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1954年以来,我们和有关单位合作,不断作东北地区的■类调查,积累一定数量的标本,经过鉴定,共得14种。按分布情况,可分为四种类型:
Since 1954, we have been cooperating with the relevant agencies to continuously make ■ type surveys in the northeast region and accumulate a certain number of specimens. After identification, we have obtained a total of 14 species. According to the distribution, it can be divided into four types: