21.   A steel tube full of ball bearings exploded in an airport toilet.

n. + tube >>共 201
steel 4.09%
float 3.70%
toothpaste 3.12%
rubber 2.92%
nasogastric 2.73%
tracheotomy 2.73%
dip 2.73%
oxygen 2.53%
mesh 2.14%
display 1.95%
steel + n. >>共 759
industry 6.54%
company 6.51%
mill 4.53%
import 3.31%
maker 3.27%
product 2.45%
door 2.44%
producer 2.25%
beam 2.24%
price 2.14%
tube 0.38%
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