Tanthauzo ndi mfundo ya boti la graphite Tanthauzo la boti la graphite: Boti la graphite ndi nkhungu ya graphite, yomwe imakhala ndi ma groove owoneka ngati W a njira ziwiri zokhotakhota moyang'anizana ndi poyambira pawiri ndi zoyambira pansi, pansi, kumtunda kumtunda. nkhope, mkati, ...
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