1. Awọn ọgbọn rira keke keke oke 1: ohun elo fireemu Awọn ohun elo akọkọ ti fireemu jẹ awọn fireemu irin, awọn fireemu alloy aluminiomu, awọn fireemu fiber carbon, ati awọn fireemu nano -carbon.Lara wọn, iwuwo ti fireemu irin kii ṣe ina.Ipata, imọ-ẹrọ ti yọkuro, ṣugbọn…
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