security protection distance
安全防护距离
以上为机器翻译结果，长、整句建议使用 人工翻译 。
In turn, the utility can offer its ratepayers a package of some two dozen consumer services, including Internet access, appliance protection, satellite television, long-distance telephone service, carbon-monoxide protection and security.
ECONOMIST: Electricity marketing: Not as billed | The
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