A double flexible metallic O-Ring seat provides a (1) static and (2) dynamic seal and assures compliance to fire-safe specifications.

双重柔性金属O形环阀座具有静止和动态密封性能，确保符合防火规则要求。

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Malik said homeowners everywhere should take steps to make sure their roofs are reinforced, their Windows and doors are secure and their buildings have a fire-safe zone around them, he said.

马里克建议各地居民应该采取措施，确保房顶加固，门窗牢固，以及房屋周围有防火区。

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However, fire officers have said a complete inventory of the damage will not be possible until the cathedral structure has been deemed safe.

然而，消防官员表示，在大教堂结构被认定为安全之前，不可能对其损坏情况进行全面清点。

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Treasurys are the only sure-fire safe asset around, even though real yields on shorter-dated U.S. debt are negative.

FORBES: Fed Policy, Easy Money, And The Sum Of All Fears

As search-and-rescue teams checked the conditions were safe enough for a diving team, fire-fighters combed the riverbank.

BBC: Inquiry into four river deaths

Obasanjo said the talks in Nairobi are aimed at resolving three things: a sustained cease-fire in eastern Congo, a safe corridor for humanitarian assistance in the region, and the implementation of a lasting peace in Congo.

CNN: Congo peace talks open with U.N. plea