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| 内部大范围电话服务 | |||
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| 内部大范围电话业务 (INWATS, inward WATS); 局内电话业务 (INWATS, inward WATS) | |||
| 内部广域电话服务 | |||
| 受话广域电话业务 (BP AT&T 公司的 800 业务,受话付费业务，免费呼叫业务); 受话广域电话业务即AT&T 公司的 800 业务,受话付费业务，免费呼叫业务 | |||
| English thesaurus | |||
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| INWATS (Telephony) | |||
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