a remote control source
远程控制源
以上为机器翻译结果，长、整句建议使用 人工翻译 。
They may be installed either upstream or downstream of a regulator or meter, and may be controlled directly or from a remote pressure source by means of an external control line.
它们可安装于减压阀或计量表上下游，并可直接控制或以外接远端压力源控制线做远端控制。
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Methods are already being developed to implant a light source inside the body which could be activated by remote control.
ECONOMIST: Neurology
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