... switchboard 交换机 switched carrier 切换载波 switched line 交换线路 ...
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Carrier later switched from piston power to the centrifugal chiller, which allowed much larger Spaces to be cooled.
Carrier后来把活塞动力改为离心式制冷机，可以冷却更大空间。
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At the carrier switching office, the voice is separated from the data and converted back to regular circuit-switched voice.
CNN: Voice over DSL trial passes muster
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