Kev siv cov kua tshuaj lom neeg yog dab tsi?

Cov kua tshuaj yog siv dav hauv ntau yam kev lag luam thiab lawv cov kev siv tseem ceeb suav nrog:
1. Kev tsim tshuaj lom neeg
· Raws li cov tshuaj tiv thaiv raw khoom lossis nruab nrab
· Koom nrog cov tshuaj synthesis tshuaj
· Siv rau kev sib cais, rho tawm, kev sib cais thiab lwm yam txheej txheem
2. Kev kho deg
· Siv los ntxuav cov hlau, iav thiab lwm yam ntaub ntawv
· Pickling, alkali ntxuav, phosphating thiab lwm yam kev kho deg
· Txhim kho cov khoom nto ntawm cov khoom
3. Lub zog thiab lub zog
· Cov roj ua kua xws li roj av, diesel, thiab lwm yam
· Lubricating roj rau lubrication ntawm txhua yam khoom · Hydraulic roj rau hydraulic zog system
4. Kev tsim tshuaj
· Raws li cov khoom siv raw thiab hnyav rau cov tshuaj synthesis
· Siv rau kev rho tawm thiab sib cais hauv cov txheej txheem tshuaj
5. Kev thov ua liaj ua teb
· Ntau yam tshuaj chiv tov thiab tshuaj tua kab
· Siv rau qoob loo fertilization thiab tshuaj tua kab
6. Kev lag luam tshuaj txhua hnub
· Detergent, xab npum thiab lwm yam khoom siv tshuaj txhua hnub
· Xim, nplaum, thiab lwm yam
· Spices, dyes, thiab lwm yam
7. Kev tswj hwm ib puag ncig
· Siv rau kev kho dej phwj tuaj, huab cua purification, thiab lwm yam
· Raws li cov tshuaj tiv thaiv reagent.