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ion treatment of solid surface
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ion treatment of solid surface
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ion treatment of solid surface
离子表面处理
用一定能量的离子轰击固体表面,使固体近表面层物理、化学性质发生变化的工艺技术。
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navigational lighting aid system
navigational object
navigational planet
navigational satellite
navigational sports
navigational star
navigational star number
navigational time scale
navigational triangle
navigation and positioning
navigation and positioning on the sea
navigation and search on complex network
navigation aqueduct
navigation brain system
navigation by earth reference
navigation by map-matching
navigation by space reference
navigation channel of Xijiang River
navigation clock
navigation constellation
navigation coordinate system
navigation delay calibration
navigation disease monitoring
navigation electronic map
navigation electronic warfare
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