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Ntau -Tration Rotating disk

Cov lus piav qhia luv luv:

Qhov chaw nres tsheb ntau tsis siv neeg Qeeb Laser Marcing tshuab Admas Tsim Nyog Cov Neeg Siv Khoom Zoo Siab, thiab Rotary Axis Advention Multi-autab Liab Ntxub Ntxub Tsim Los Txhim Kho Kev Ua Haujlwm.