Tuam Txhab Xov Xwm
《 Sau rov qab
Cov xwm txheej uas yuav tsum tau ntsib thaum siv lub qhov tob

1) Xyuas kom qhov coaxiality ntawm lub laum yeeb nkab nkhaus Cov kev tuav taw qhia ntawm lub txaj ntawm lub sib sib zog nqus cov ntaub ntawv qhia kev tsheb nqaj hlau tsim nyog rau lub qhov tob tshuab, uas muaj peev xwm loj thiab qhia kev tseeb; Cov lus qhia kev sib tw tau quenched thiab muaj lub siab hnav tsis kam. Sib sib zog nqus lub qhov drill yog siv los ua cov txheej txheem sib sib zog nqus qhov nrog lub qhov tob (d / l) ntawm ntau tshaj 1: 6, xws li rab phom phom, rab phom phom thiab tshuab tshuab spindles.
2) Stepress Haum ntawm qhov pub txav kev nrawm.
3) Muaj txaus siab, ntws thiab ntxuav cov kua dej.
4) Lub qhov tob tob laum muaj kev nyab xeeb tswj cov khoom siv (tower lom zem







