Khib tawm

Yuav ua li cas thiaj zoo faib cov khib nyiab

Cov khib nyiab feem ntau tau muab faib ua plaub pawg: cov khoom siv rov ua dua tshiab, chav ua noj hauv chav tsev, khib nyiab dej thiab lwm yam thoob khib nyiab.

Cov khoom siv rov ua dua: suav nrog tsib pawg ntawv pov tseg, ntawv yas, iav, hlau thiab daim ntaub. Nws yuav tsum raug sau tseg tias daim ntawv so tes thiab daim ntawv so tes tsis tuaj yeem siv rov qab vim lawv cov dej muaj zog solubility.

Cov zaub mov pov tseg: Tseem hu ua cov khib nyiab ntub hauv Shanghai, nws suav nrog cov zaub mov pov tseg xws li cov khoom seem, pob txha, zaub hauv paus, thiab tev.

Cov khoom siv pov tseg: yog hais txog cov pov tseg uas muaj cov hlau hnyav uas tsim kev puas tsuaj rau tib neeg kev noj qab haus huv, tshuaj lom, lossis ua rau ib puag ncig muaj mob.

Cov khib nyiab uas muaj xws li roj teeb, qhov muag teeb, cov ntsuas cua mercury, cov xim pleev xim, cov khoom siv tas sij hawm, cov tshuaj pleev ib ce tas sijhawm, thiab lwm yam.

Lwm cov khib nyiab: Nws hais txog cov cib, ceramics, muck, ntaub hoob nab, phuam ntawv thiab lwm yam khoom siv uas tsis yooj yim rau kev siv dua li cov saum toj no. Cov txiv ntoo ua plua plav, plua plav, hnab ntim khoom noj (thawv), av ntxuav av tuaj yeem txo cov dej, av thiab huab cua.