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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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