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The use of tools for pounding, digging, scraping and cutting is what distinguishes humans from apes. More and more insidious consequences of improper tool design are cumulative traumas,such as carpal tunnel syndrome,trigger finger.We will feel a pain in the wrist and fingers,when we are using the spray cans.So,basing on the Human Factors In Engineering And Design,we design the new spray cans.On the one hand,we will change the way of grab about the spray cans,when we are using it.We can maintain a straight wrist.On the other hand,we change the Index Finger Switch to Recessed Finger Strip,In this way,we can avoid repetitive finger action.
Xiamen City, Fujian Province, China