Ma graphite crucibles, omwe amadziwikanso kuti milu ya graphite kapena ma ladle amkuwa osungunuka, ndi zida zofunika pantchito yosungunulira zitsulo.Ma crucibles amagwiritsidwa ntchito kusungunula zitsulo zopanda chitsulo monga mkuwa, mkuwa, golide, siliva, zinki, ndi lea ...
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