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可调内阻电池
Storge cell with adjustable internal resistance
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钠的吸收光谱装置
A set for producing absorption spectrum of sodium
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威尔逊云雾室技术条件
Specification for wilson cloud chamber
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力矩盘
Force moment table
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生物骨骼标本总则
General rules for animal skeleton specimens
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向心力演示器(压杆对比式)技术条件
Specification for centripetal Force demonstrator (method of pressing lever and comparison)
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积木
Building blocks
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计数彩棍
Color counting sticks
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毛钱管(牛顿管)技术条件
Technic conditions of feather and guinea tube (Newton tube)
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空盒气压计
Aneroid barometer
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