3the Master control staff immediately sets security cordon in the accident area and wears gas mask and protective jump suit etc. protective equipments or safeguards to examine the leaking point.

主控人员立即对事故发生地点区域设置安全警戒，戴上防毒面具、连体防护服等防护用品或设施，对泄漏点进行检查。

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There is a tight security cordon around the area.

这一地区周围设有严密的安全警戒圈。

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Vehicle trips into or within the cordon area were projected to fall by 100, 000 a day and the average traffic speed to increase by 7%.

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Officials were seen rushing towards the buildings to cordon off the area.

BBC: Huge blast rocks Pakistani city

But he said the shortage of specialist officers would exacerbate the measures needed to maintain a cordon in an inner city area to prevent contamination being spread.

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