Chaw nres tsheb barrier rooj vag yog ib qho ntawm COMA cov khoom tseem ceeb. Nws ua lub luag haujlwm tseem ceeb hauv kev tswj hwm chaw nres tsheb thiab nws feem ntau ua ke nrog chaw nres tsheb nkag, tawm chaw nres tsheb, chaw them nyiaj thiab chaw nres tsheb tswj software.

Lub qhov rooj thaiv qhov rooj tsis siv neeg tau npaj txhij, tsuas yog tos rau kev sim thiab ua haujlwm. Tshwj tsis yog ncaj caj npab barrier rooj vag, peb muaj lwm yam barrier rooj vag nrog 90 los yog 180 degree floding caj npab, uas yog haum rau sab hauv tsev chaw nres tsheb thiab yooj yim rau kev thauj mus los.
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