管道延伸。可指定送风管道或回风管道。可以指定单线管道或双线管道。
Duct extension. Supply or return duct can be specified. Single - or double-line ducts can be specified.
2001年，里海联盟石油管道开通，从西哈萨克斯坦的坦吉斯油田一直延伸到黑海，这大大增加了该国的石油出口量。
The opening of the Caspian Consortium pipeline in 2001, from western Kazakhstan "s Tengiz oilfield to the Black Sea, substantially raised export capacity."
纽约的供水管道一直向北延伸到125英里远的卡茨基尔（Catskills Mountain）山；
New York City is supplied by a web of tunnels and pipes that stretch 125 miles north into the Catskills Mountains;
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