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<-> 美国
联邦科技情报交换中心
org.name.
Clearinghouse for Federal Scientific and Technical
美国
联邦科技情报交换中心
gen.
Clearinghouse for Federal Scientific and Technical Information
联邦科技情报交换中心
美国,现更名 NTIS
el.
Clearinghouse for Federal Scientific and Technical Information
联邦 科技情报交换中心
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