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each holder has a sliding collar and a free end that is curved to accept test tubes of diameter 22mm to 32mm
including multi-parameter testing
soil analysis
and math) based learning
as a long-lasting meter leads to cost savings over time
Day And Night Model (Motorised) ball and ring apparatus each holder has a slidingDay And Night Model (Motorised) Offering Day And Night Model (motorised) . Type: Science & Nature Dimensions (LxWxH) Cms: 39*14*8 Age: all age group Material: mixed Brand: National Skill Development: Others Gender: Unisex Best Working Models of Solar System from India Ideal for Educating Children in Classroom or Science Fair Project Day and Night Model (Motorised). This motorized working model educates students how Day & night works
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