Hlau nplaum teb Demo. Tswj

Magnet Field Demo. Board Featured Image

E13.0131

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Khoom Nthuav dav

Cov khoom lag luam

E13.0131Hlau nplaum teb Demo. Tswj

Muaj 24 daim duab ntsuas me me, siv nrog bar hlau nplaum los qhia cov hlau nplaum teb.

Yav dhau los: DIY Tsheb Teeb

Tom ntej: Tib Neeg Pulmonary Alveoli

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Khoom Siv Kho Kom Muaj Zog
$Educational Diffraction Grating,600 Lines$

Kev Qhia Ntawv Tshwj Xeeb Cov Nrig, 600 Kab
Mirage Demo. (Khawv koob tiv thaiv)
$Educational Diffraction Grating,100 Lines$

Kev Qhia Ntawv Tshwj Xeeb Grating, 100 Kab
Txoj Cai Sab laug / Txoj Cai Txuas Demo
Me Me Hlau nplaum koob