Menşe Yeri
Beijing, China
For
Teaching instrument teacher school science education university
remarks
Demonstrator Experimental apparatus senior principle installation
Available for
primary school junior high school middle classes and grades in school
grade
one two three four five six seven eight nine grade
contribute to
popularization of science study thought imagine develop
branch of learning
innate laws of chemistry living things history mathematics sociology
consult
electricity optics magnetic force Dynamics acoustics physical culture
