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| working cost | |||
| cost of operation | |||
| operating charge; operational costs | |||
| operating cost; operating expenditure; operating expenses | |||
| operation costs | |||
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作业费用 : 7 phrases in 5 subjects |
| Business | 2 |
| Economy | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Oil / petroleum | 2 |
| Technology | 1 |
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