ventilation system/nmn
n. + system >>共 804 个
computer 5.46%
school 2.85%
defense 2.63%
missile 2.33%
justice 2.00%
pressure 1.82%
tax 1.74%
security 1.68%
cable 1.60%
control 1.49%
ventilation 0.50%
ventilation + n. >>共 49 个
system 57.14%
shaft 5.65%
duct 5.65%
pipe 2.99%
tube 2.99%
fan 2.99%
hole 2.33%
equipment 1.99%
hood 1.33%
opening 1.00%
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