N-COUNT A branch line is a railway line that goes to small towns rather than one that goes between large cities. 铁路支线
The company has its own sidings, connected to a branch line and then to the main line so that coal can be moved farther afield.
电站有自己的专用铁路，连接支线、主线，所以煤炭能更远的运出去。
The London train pulled into the branch line station.
这列伦敦火车缓缓驶进了支线车站。
Also all safety relief valve line branch line and tubing line for instrument will be dried and purged.
此外，所有安全卸压阀、支线和仪表管线应进行干燥和吹扫处理。
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