The reel-type lay barge was designed to lower offshore pipeline construction costs by increasing the layingrate and decreasing the time.
卷筒式铺管船可增大铺管速度并减少铺管时间，从而减少海洋管道的建设成本。
2
The experiments, proved that developmental quality of root system of cutting seedling and lignification degree of root system during seedling-laying are key factors to influence survival rate.
本文通过试验证实了扦插根系发育质量与倒苗时根系木质化程度是影响定植苗成活的关键。
3
The rate of rail creep lengthening at the beginning after rail laying on the track is greater than that of the afterward time.