Each unit should include a main switch and ammeter with a scale of about 20 ampere capacity.

每一套装置应包括一个主开关和电流表，电流表的刻度范围约20安培。

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The network topology takes a star shape, with all racks connecting back to a main switch in the management rack.

网络拓扑采用星形结构，所有机架向后连接到管理机架的主交换机。

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Set the main switch selector to a (auto).

把主选择开关调至a(自动)。

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In such schemes, the U.N. envisions itself manning the main switch.

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But that will change with the Internet's next phase, when the main platform will switch from the PC to the Internet itself, and in which hosted services will emerge and the economy will move online, he said.

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If more horsepower is needed, then the user can quickly switch into the main operating system, which Cloud continues to load in the background.

ECONOMIST: Google goes in search of an instant operating system