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十字蕨目
小灌木,立体分枝,无叶片,产顶生孢子囊,主轴、侧枝和羽轴横切面初生木质部呈十字形的一类真蕨植物化石。
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trade
Trade Act of 1974
Tradeand Labour Congress of Canada
Trade and Tariff ACT of 1984
trade balance of coal
trade balance of crude oil
trade balance of energy
trade barriers of aquatic products
trade books
trade competitiveness index
trade credit
trade dependence
Trade Expansion Act of 1962
Trade Facilitation Agreement
trade index
trade in education services
trade in services agreement
trade in technology
trade mark
trademark application
trademark appraisal
trademark archives management
trademark ban
trademark coexistence
trademark confusion
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