





B5 coil notebook, 5+5 holes on the side, horizontal lines, 50 sheets/100 pages - transparent *2
Simple and elegant design with coil binding
PP transparent cover for waterproof and dirt resistance
Module = the weaving surface of the hour field
Interconnected formulas, x%
S3 = S-SANB, 2 surface softening
Formulas and rules used for network diagrams
Utilization of the method of cutting and supplementing irregular shapes
Area calculation for irregular shapes
Idealized physical experience thinking
Gas and point charges learned later
Thick paper, suitable for double-sided writing without ink seepage
Yellow eye-protecting paper for fatigue-free writing
Double coil design for easy page turning
Inner pages with horizontal lines, suitable for note-taking, journaling, and work records
High-quality double coils for smooth page flipping

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