Toll-free telephone number
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British pronunciation/tˈəʊlfɹˈiː tˈɛlɪfˌəʊn nˈʌmbə/
American pronunciation/tˈoʊlfɹˈiː tˈɛlɪfˌoʊn nˈʌmbɚ/

"toll-free telephone number" 的定义和意义

Toll-free telephone number
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免费电话号码

a phone number with a distinct three digit code that is free of charge for the calling party
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