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safe separation | |||
safty range | |||
safe range | |||
berth; mooring; roadstead | |||
safe clearance | |||
safe distance; safety distance | |||
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safety distance; safe clearance | |||
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safety distance | |||
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safe grounding circuit distance | |||
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separation distance | |||
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headway |
安 全 距离 : 58 phrases in 13 subjects |