In the same time, a calculating formula of welding flat cover special for hydraulic test is deduced by setting certain safety coefficient of hydraulic test.

同时通过对试验压力取一定安全系数，推导出液压试验专用焊接平盖的计算公式。

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Additional safety features include run-flat tyres, a self-sealing fuel tank and a fire-extinguishing system.

额外的安全功能包括防滑轮胎，自动封口油箱和灭火系统。

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Flat tempered safety glass is kind of high-strength safety glass obtained by heating common glass to softening point and then air cooling it abruptly.

水平钢化安全玻璃是将普通玻璃加热至软化点时，然后急剧风冷所获得的一种高强度安全玻璃。

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When that happens, if there's any movement sufficient to knock the headstone over it's laid flat in the interests of safety.

BBC: Cromer cemetery headstones laid down in safety fears

Such people worry about his habit unique among Ukraine's grandees of driving himself to work and living in his own flat rather than in the safety of a government compound.

ECONOMIST: Viktor Yushchenko, Ukraine��s faint hope

The 45-year-old had been accused of holding Jennifer Findlay prisoner in a Lochee flat, making her fear for her safety and causing her to fall.

BBC: Elders court