Dab tsi yog qhov chaw tsim khoom stamping? Txoj Kev Ua Haujlwm: Hauv qhov tseem ceeb, cov chaw tsim khoom stamping yog lub chaw tsim khoom tshwj xeeb uas muaj ntau yam khoom tsim los siv txoj kev stamping. Feem ntau ntawm cov hlau, xws li steel, aluminium, kub, thiab sophisticated alloys, yuav siv tau rau stamping. Qhov kuv...
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