11.   The fluid business revolves around manufacturing hydraulic cylinders and truck tipping systems.

a. + cylinder >>共 153
metal 6.06%
plastic 4.92%
master 4.17%
hydraulic 4.17%
small 3.79%
large 1.89%
concrete 1.52%
outer 1.52%
hollow 1.52%
little 1.52%
hydraulic + n. >>共 110
system 16.16%
fluid 8.18%
lift 6.13%
pump 5.11%
jack 4.91%
cement 4.29%
line 3.89%
pressure 3.48%
power 2.86%
problem 2.66%
cylinder 2.25%
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