Athe chain is not upright
Bthe chain is tight
Cthe chain is upright
Dthe chain is slack
Dress up the ().
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()up Maritime Declaration of Health.
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Be careful()to mix them up.
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在自动并车过程中,为获得合闸超前角需用鉴幅器和微分电路,若鉴幅器的动作电平为UP1,返回电平为UP2,则UP1与UP2的关系为(),鉴幅器输出的波形图为()。
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Please choke up the drums to prevent().
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In anchoring orders,UP AND DOWN means().
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Please choke up the drums to prevent().
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Static electricity may be built up by the().
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Sailing directions are kept up to date by ().
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