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| 电话电报管理局 | |||
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| 国营邮电主管部门; 邮电管理局; 邮电部 (PIT 与 common carrier 相对，后者为民营,仅经营电信) | |||
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| PTT | |||
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post telephone and telegraph administration : 1 phrase in 1 subject |
| Electronics | 1 |
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