Cov Haujlwm Tseem Ceeb

Cov Haujlwm Tseem Ceeb:kev pabcuam kev txawj ntse, kev txhim kho txuj ci, kev sib tham tsim kho, kev hloov pauv hloov txuj ci, hloov tev naus laus zis thiab kev siv thev naus laus zis; Kev tsim tawm ntawm cov kabmob, zog thiab kis cov khoom; Kev muag cov kabmob, zog thiab cov khoom sib kis; Cov kabmob raug; Kev kub ceev precision hnyav luag cov kabmob coj muag; Xyooj muag; Cov khoom tsim kho cov khoom lag luam; Kev tsim cov kabmob cov khoom lag luam steel; Forging thiab hmoov metallurgy cov chaw tsim khoom; Kev tsim cov khoom hluav taws xob high-speed thiab cov khoom siv thauj khoom; Kev zam txim thiab cov hmoov hlau ua khoom muag muag; Kev muag cov khoom loj ntawm cov tsheb ciav hlau thiab cov cuab yeej siv thauj khoom; Kev tsim khoom ntawm cov neeg hlau tsim kev lag luam; Kev tshawb nrhiav thiab kev tsim kho cov tsheb thau khoom (tshwj tsis yog cov haujlwm yuav tsum tau txais kev pom zoo raws li txoj cai, muaj kev ywj pheej ua cov haujlwm lag luam raws li txoj cai nrog daim ntawv tso cai ua lag luam).

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