To solve the problems with the measuring of the verticality of oil well pump liners, a simple measuring meter is designed. 為解決抽油泵襯套垂直度測量較困難的問題，根據(jù)抽油泵襯套的特點(diǎn)，設(shè)計(jì)了抽油泵襯套垂直度簡易測量儀。
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. 針對高層建筑電梯安裝過程中導(dǎo)軌垂直度與平行度的要求，設(shè)計(jì)了一種新型的激光準(zhǔn)直系統(tǒng)。