Cov qauv vaj huam sib luag, Kev tsim cov chaw nres tsheb 28-30, ncej loj dua, lub tshuab hnyav dua, loj dua, muaj zog dua kev pab cuam lub neej.
Cov tuab tuab yog 1.2 hli (qhov kev teeb tsa tuaj yeem nce mus rau 1.5 hli)
Cov khoom siv rau cov menyuam Cr12, siab hardness thiab zoo tsim cov nyhuv
Peb cov hniav txiav, tsis muaj burr, zoo forming nyhuv, tsis deform.
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