Keeb kwm ntawm sealing tshuab
Thaum pib ntawm lub xyoo pua 11th AD, sealing tshuab thawj zaug hauv Suav teb;Tib theem ntawm sealing tshuab thawj zaug tshwm sim nyob rau txawv teb chaws nyob rau hauv lub xyoo pua 15th, thiab tau siv rau Archimedes era nyob rau hauv 1700;Nws yog ib qho tsim nyog sau cia tias lub tshuab sealing no (packing seal) tseem siv tau rau qee lub sijhawm tshwj xeeb niaj hnub no.
Post lub sij hawm: Nov-01-2022
