Cov xov paj hemp
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Cov xov paj hemp
Ua pa tau zoo, nrog rau qhov kev xav txias tshwj xeeb, hws tsis lo rau lub cev; Xim ci, ci ntsa iab zoo, tsis yooj yim ploj, tsis yooj yim ntsws; Kev ua kom sov, hygroscopic dua li paj rwb ntaub, cov tshuaj tiv thaiv acid thiab alkali tsis rhiab heev, tiv thaiv pwm, tsis yooj yim rau cov pwm ntub, tiv thaiv npauj npaim, hemp ntaub tuaj yeem kho qhov kub thiab txias, tab sis kuj tiv thaiv kev ua xua, thaum lub caij ntuj no tuaj yeem tiv thaiv static, thiab tshwj xeeb tshaj yog rau cov neeg mob tuaj yeem dhau mus, tuaj yeem muaj cov nyhuv ntawm kev tiv thaiv, thiab sui ...