Based on the actual condition of air-conditioned train, this paper designes questionnaires about IAQ intrain compartment and investigates the IAQ by the questionnaires.
Now we are face with actual or possible rigorous challenge of dairy safety.We must pay high attention to it.Adopt to active counterplot seriously an...
For the special requirement and actual application status of medical instrument, the simulation analysis was taken, giving chirurgeon a support to make operating plan.