Qhov teeb meem ntawm extruded board yog kho nws thaum siv.Ntau tus neeg ua haujlwm tsim kho yuav tsum siv tus pas ntsuas 2-meter kom flatten lub extruded board thaum lub sij hawm tus txheej txheem ntawm lo rau ntawm phab ntsa, kom ntau li ntau tau kom lub flatness ntawm lub extruded board.Nyob rau tib lub sijhawm, qhov chaw nruab nrab ntawm pl...