Erosion, dilation, opening operation and closing operation are the basis of mathematical morphology.

膨胀、腐蚀、开运算、闭运算是数学形态学的基础。

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For LW14 and LW15 SF6 circuit breaker, the reason of reclosing block after opening operation has been analyzed in the paper.

对部分LW14, LW15型SF 6断路器分闸操作后重合闸闭锁的原因进行了分析，提出了改造方案，并在实践中取得了良好效果。

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In the range where the car door is not aligned with the landing door, the opening operation of the car door is mechanically stopped.

在轿厢门与层站门没有卡合的范围内，机械地阻止轿厢门的打开动作。

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New Zealand resumed their faltering innings on 187-8, but had only one wicket in hand with opening batsman Craig Cumming recovering from an operation.

BBC: Kallis powers S Africa into lead

Zaire will almost certainly follow suit, opening an opportunity for cross-border mining co-operation.

ECONOMIST: Zaire

Pound said a comprehensive out-of-competition dope-testing program was already in operation ahead of the Games which officially start with the opening ceremony on Friday.

CNN: Anti-drugs chief confirms HGH test