The utility model discloses a safety arch centering, which is mainly used for a support for covering an agricultural film.

本实用新型公开的安全拱架，主要用于覆盖农膜时的支撑物。

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It is warrant careful research that how much is the safety factor of a high arch dam.

高拱坝潜在安全度究竟有多高是值得认真研究的问题。

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The optimization design for high arch dam shape is a key technology which will affect the dam safety and the cost of high arch dam.

高拱坝体形设计是关系到大坝安全和经济的关键技术问题。

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And, with great irony, Sunderland are now one of the teams who could provide a late escape route to safety for arch-rivals Newcastle, who play Portsmouth at home on Monday.

BBC: West Brom 3-0 Sunderland