Vim li cas cov ntsia hlau thiab cov txiv ntseej feem ntau yog hexagonal?
Raws li peb txhua tus paub, threaded fasteners feem ntau zawm qhov chaw. Piv txwv tias cov txiv ntseej muaj n sab, lub kaum sab xis ntawm txhua qhov tig ntawm tus ciaj ntswj yog 360 / n? degrees, yog li tus naj npawb ntawm sab nce, thiab lub kaum sab xis ntawm kev sib hloov qis. Feem ntau, qhov chaw tshwj xeeb ...
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