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Khoom npe: roj yeeb nkab sib koomKhoom qauv: 90 ° an4, an6, an8, an10, an12xim: xiav lossis dub, peb tuaj yeem tsim raws li koj tus qauv tsim.An3 rau an20 muaj, thiab ncaj qha, 45 degrees, 90 degrees, 120 degrees, 150 degrees thiab 180 degrees muaj.Cov yam ntxwv ntawm cov khoom: nws yog ua los ntawm cov khoom siv zoo aluminium thiab muab khi rau ntawm qhov sib koom ua ke kom tsis txhob muaj cov roj to thiab cov roj to.Cov khoom no yog tsim nyob rau hauv Taiwan Hoobkas, nrog high-qib zoo, kom ntseeg tau tias tsis muaj roj to thiab installation muaj kev ruaj ntseg kiag li.Tsis muaj roj to hauv cov qauv tsim thiab kev nyab xeeb.