常見例句用作名詞 (n.)In view of the requirements of the verticality and parallelity in the process of equipping elevator for high building, a new laser collimating system is presented.針對高層建築電梯安裝過程中導軌垂直度與平行度的要求，設(shè)計了一種新型的激光準直系統(tǒng)。 返回 parallelity