The longitudinalgradient difference near structures should be measured to guide repair and maintenance of highway.
为指导维修养护，须监测结构物附近的纵坡差；
2
A longitudinalgradient magnetic field was introduced into the discharge space by placing a permanent magnet under the substrate.
通过在基片的下方放置磁铁，在放电空间中引入了纵向的磁场梯度。
3
Explaining the details of road safety evaluation process, for the longitudinalgradient, tunnel and other accident-prone sections, the paper gives the security measures.