AbstractThis study aims to: 1. create a removable valve valve grinder and a car to escape a semi-automatic zero indent. 2. unplug the machine and grinding performance in order to find the valve valve car escape semi-automatic zero indent. 3. to compare the duration of valve and valve assembly valve car indentation between the Centre and crack the escape valve assembly valve car escaped with a semi automatic zero indent using special tools. (C-Camp) 4. to study the user satisfaction in enterprises that have a connection and valve grinding, unplug the car to escape a semi-automatic zero indent valve by using the tools in the research is the query information and recording satisfaction in feedback analysis averages/save hundreds. The research found that removing the valve and can be removed from the composed and grinding, all under 20, who met preset assumptions.
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