They receive oil through pipeline gathering systems from production tanks and relay it to trunk line stations.
它们通过管道集油系统从生产罐接受原油，并把它转输到干线泵站。
2
By statistically analysing those accidents of gas trunk line at Sichuan OaS Field, the paper concludes that the internal corrosion is the main reason in pipeline accidents.
本文通过对四川气田输气干线事故的统计分析，说明了内腐蚀是管道事故发生的主要原因。
3
These gathering systems are normally owned by the pipeline company that operates the main trunk line.