1.   A metal security grate was pulled down over the other two, and three other exits were locked.

2.   At the main door, a metal security grate was pulled down over two of three doors, leaving only one door open.

3.   At the main entrance, a metal security grate was pulled down over two of three doors, leaving only one door open.

4.   Shopkeepers pulled down security grates.

n. + grate >>共 32
sidewalk 12.68%
iron 8.45%
sewer 8.45%
subway 8.45%
fire 5.63%
grill 5.63%
security 5.63%
window 4.23%
afternoon 2.82%
brass 2.82%
security + n. >>共 445
force 16.92%
official 8.09%
measure 3.87%
service 2.70%
concern 2.53%
source 2.32%
reason 2.31%
officer 2.29%
firm 2.22%
issue 1.82%
grate 0%
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