Qhov hardness ntawm cov ntsiab lus yog qhov tseem ceeb rau kev ntxiv lub neej thiab qhov ua haujlwm ntawm cov khoom siv hauv tsev tsim khoom. Cov duab ntawm cov duab silica (fumed lossis precipitated silica) yog qhov tseem ceeb uas muaj ntau yam; nws tuaj yeem siv los ntxiv qhov hardness ntawm cov ntsiab lus...
Saib ntxiv
Kev siv cov duab ntawm cov duab iron oxide rau kev khiav qhov duab ntawm cov ntsiab lus concrete brick, paver, thiab cov khoom siv lwm yam uas muaj cov ntsiab lus yog tau txais. Qhov popular ntawm no tsis yog qhov tsis muaj kev cuam tshuam--vim nws yog cov duab khoob uas muaj ntau yam, cov duab iron oxide muab cov qhov stability, safety thiab b...
Saib ntxiv
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