它是用单线及双线系统管道路线。
It is used with single line and double line system by piping line.
该州的共和党州长戴维·海涅曼已致函国务卿希拉里·克林顿，要求她拒绝签署许可证，除非横加公司修改管道路线。
The state's Republican governor, Dave Heineman, has written to Hillary Clinton, the secretary of state, asking her to refuse the necessary permit unless TransCanada modifies the pipeline's route.
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