Kubvumbi US simbi inotengeswa kunze kwenyika, kugadzirwa kunotsvedza kutengwa kwesimbi kuUS uye kugadzirwa kwesimbi kweUS kwakatanga kupfava. Sekureva kweUS Census Bureau, yakazara US zvigadzirwa zvesimbi zvakadzikira ne11.68% kubva munaKurume kusvika Kubvumbi. HRC, CRC, HDG uye coiled plate inotengeswa kunze kwenyika yakaona 25.11%, 16.27%, 8.9 ...
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