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教学用放射保管使用防护要求
Storage, usage and protection requirements for teaching radioactive source
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教学用光学仪器通用技术条件
General specification for teaching optical instruments
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演示算盘
Denomstratiwgabacus
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容量单位演示器
Specification for the capacity vnit demonstrator
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被子植物种子切片
Angiosperm seed slide specimen
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被子植物生殖器官及胚胎发育玻片标本
Reproductive organ embryonic development of angiosperm seed slide specimen
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蕨类玻片标本
Ferns slide specimen
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藓类玻片标本
Mosses slide specimen
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地衣玻片
Lichen slide specimen
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