A cikin 'yan shekarun nan, masana'antar kera motoci ta kasar Sin ta samu ci gaba cikin sauri, kuma ana amfani da polyurethane, daya daga cikin kayan aikin polymer, kuma ana kara yin amfani da shi sosai a sassan motoci.A cikin samfuran kayan aikin wayar hannu, babban aikin layin jagorar wayar tarho shine tabbatar da cewa na'urar ta kasance sa...
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