- School teaching :increase students' understanding of expansion and contraction and consolidate learning effects,Tool for Expansion and Contraction Test
- Physical experiment tool:stimulate students' interest, analysis and observation skills,Teaching Apparatus
- Physical experimental apparatuses: verification, convenient and intuitive,Experimental Apparatus for School
- Physics experiment tool:lightweight and compact, you can carry it with you,Tool for Physical Experiment
- Expansion and contraction physics experiment:heat expansion and cold contraction experiment supplies,Sheetmetal for Thermal Expansion and Contraction
