To maintain the spool in the head and valve seat rings for tight closure is important.

保持阀芯头与阀座环对中，对于严密关闭是重要的。

youdao

Higher water head closure has become a trend with the development of river way closure.

从河道截流的发展趋势来看，高水头截流已成为一种趋势。

youdao

"If an agreement is signed with unions, this staff redeployment would require neither a plant closure or a voluntary redundancy programme, " Gerard Leclercq, head of Renault's French operations, told AFP.

BBC: Renault to cut about 7,500 jobs in France

Malcolm Bell, head of tourism at Visit Cornwall said budgetary restraints forced the closure of the information centre last year.

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"We must move away from this blanket closure and find ways to flexibly open air space, step by step, " IATA head Giovanni Bisignani told a news briefing in Paris.

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