Guiyang Steel Special (GSS) Rock Tools Inc. tettwaga deg 1958. Ɣas i d teṛmist n usburt n usburt n uẓra, d ameqran akk n umaḍal n tmeɣra n uẓru, Anadi-d d aɣerman ay d aɣef n uɣef n tnefken n yimiriyen n tnefken deg Ccinwa, GSS d ula d taṛmist n uḍḍa n uḍef n uɣriḍen n yifaṛen n uɣef n ufared ed yisen n tmeɣli deg Ccinwa. SGSS yewweḍ asefti n tneddit n ISO 9000 n Cebḥit yerna n Asebsiwt n tneddit n ISO 14000. Iswi n GSS netta ad d-yefkeḍ ifar n tneɣrit tamezwarut akken ad ḍḍef i uḥerren n yisaɣen-nneɣ yernu ad tent-iɛawen ad tent-id-yefk n rrqit. Tifsa-d ugar yernu n tmerwin n tmerwin d aɣen-nneɣ n tfernu. Ɣef lemsazwa-nni n ulzuz i yezmerɣen. Aɣel n yiwen n tḥebsen. Deffir tḥemmleq n tgen. Asel-d ODM / OEM. Tufad n ufareqt n tmerwin n DTH. D ameqran akk n yimislen n uẓẓer deg tgunin.