Nrog rau kev nruam ntej ntawm cov khoom siv thev naus laus zis, daim ntawv thov kev sib hloov cov zaub sawv hauv kev lag luam yog nthuav dav sai, thiab nws tau dhau los ua kev xaiv nrov rau cov zaub thiab nce qib hauv ntau yam lag luam. Qhov tseeb tiam no qhia tau hais tias rotating zaub sawv tsis tau tsuas yog nyob rau hauv ib qho chaw tseem ceeb nyob rau hauv ib txwm cov khoom qhia, tab sis kuj nyob rau hauv teb xws li kaus mom, hniav nyiaj hniav kub thiab phaib txais tos.

Hauv kev sib tw khw muag khoom hnyav, kev tsim kho tshiab thiab ntau yam ntawm cov khoom siv rau cov khw muag khoom tau dhau los ua cov cuab yeej muaj zog rau cov khw muag khoom muag los tso saib thiab txhawb nqa lawv cov khoom. Cov qauv no tsis tau tsuas yog txhim kho cov zaub ntawm cov khoom, tab sis kuj tau txhaj tshuaj tshiab tseem ceeb rau hauv kev lag luam muag khoom.

Hauv kev lag luam muag khoom niaj hnub no, lub khw muag khoom txee ua lub luag haujlwm tseem ceeb, tsis yog rau cov khoom lag luam zoo xwb, tab sis tseem cuam tshuam ncaj qha rau lub khw muag khoom thiab cov neeg siv khoom. Nrog rau kev txhim kho txuas ntxiv ntawm kev lag luam muag khoom, cov khoom lag luam rhawv tau maj mam sib txawv kom tau raws li cov kev xav tau ntawm cov khoom sib txawv.

Feem ntau xyoo 1992 ua ntau tshaj qhov tsuas yog muab qhov chaw khaws khoom. Lawv cov khoom khib nyiab, suav nrog cov khoom noj khoom haus thiab cov khw muag khoom loj, nqa qib tshiab ntawm kev txiav txim thiab rov hais dua.

Cov neeg siv khoom xav tau peb los tsim lub siab load-bearing, yooj yim thiab zoo nkauj kaus mom nuv rau gridwall

Nrog rau qhov tseem ceeb ntawm kev hloov pauv huab cua thoob ntiaj teb thiab kev ruaj ntseg ib puag ncig, peb lub Hoobkas tau txiav txim siab los ua tus neeg koom tes.