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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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main spot
mainspring
main stacks
Main Stadium
mainstay
mainstay industry
main steam pipeline of boiler
main steam valve
main stream
mainstream
Main Street
main sunspot
main switch station
main system
main tail
maintainability
maintainability function
maintainability of missile
maintainability of nuclear power plant
maintainable system
maintainer line in forage plants
maintaining needling sensation
maintaining stability
maintain net energy
maintain organizational image
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