Akhungu rivet riveting osiyanasiyana ndi lonse, unsembe ndi mofulumira, ntchito ndi khola ndi odalirika, ali ntchito padziko lonse ntchito pokonza processing ntchito, ubwino waukulu pa ntchito zikuphatikizapo: mbali imodzi yomanga, riveting osiyanasiyana ndi lonse, ndi kukhazikitsa ndikofulumira, ...
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