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primary standard of exposure
释义
primary standard of exposure
Encyclopedia
工学
照射量基准
释
primary standard of exposure
照射量基准
复现X射线(5~300千伏)和γ射线(137Cs, 60Co)照射量量值,用于标准和工作级计量器具的量值传递。
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language capital
language census
language change
language communication barrier
language competence
language comprehension
language conflict
language consumption
language contact
language contact in typological perspective
language coordination
language corpus planning
language curriculum in early childhood education
language death
language delay
language development
language development assessment
language development delay
language development disorder
language dictionary
language diversity
language ecology
language economy
language education
language education planning
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