After the closing operation the closing contactor sometimes cannot recover.

有时合闸操作完成后合闸接触器仍不能返回。

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Long service life. Standing the test of ten thousands opening and closing operation.

启闭试验多达数万次，使用寿命长。

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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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An electronics manufacturer is closing its north Devon operation, with the loss of 250 jobs.

BBC: TE Connectivity closing with 250 Bideford jobs lost

The company said it hoped to complete the clean-up operation, including removing tree houses and closing tunnels, on Monday.

BBC: UK Coal say Wrekin protesters 'peacefully' evicted

World Food Program (WFP) said Friday it would begin an emergency operation to feed about 300, 000 Palestinians hit by Israel's closing their access to jobs amid continuing violence.

CNN: U.N. food agency to feed 300,000 Palestinians