Zida zosiyanasiyana za mipiringidzo yowombayo zimadalira mipiringidzo yokha, yomwe imatha kupangidwa ndi chitsulo cha manganese, chitsulo cha martensitic (martensitic chitsulo), chitsulo cha chrome, kapena zitsulo zopangira matrix (MMC, monga ceramic).Ma MMC amapangidwa ndi mitundu yosiyanasiyana yazitsulo ndi mitundu yapadera ya cera ...
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