Txhuas Cov Khoom
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Kub Rolled txhuas lub kaum sab xis polished lub kaum sab xis rau kev sib khi
Aluminium kaum yog ib qho muaj cov khoom siv txhuas nrog lub kaum ntawm 90 ° kab ntsug. Raws li qhov piv ntawm sab ntev, nws tuaj yeem faib ua ke ua ke txhuas thiab sib npaug sib npaug. Ob sab ntawm kev sib npaug sib npaug yog sib npaug hauv qhov dav. Nws cov kev qhia tshwj xeeb yog qhia hauv millimetres ntawm sab dav dav dav dav X sab dav dav sab qhov dav x sab. Piv txwv li, "∠30 × 30 × 3" txhais tau tias yog qhov sib npaug ntawm qhov sib npaug nrog ib sab dav ntawm 3 hli tuab ntawm 3 hli.