a field work to find out what conditions of the field we want to see or survey, so as a field survey expert, of course it is necessary to see a bridge to be able to take further action, a great experience, of course, very necessary for a deep experience this one .
a job that we are going to work on will make a satisfactory result with a mixture and concoction for a highly effective sample for a laboratory test that is concrete sample,a sequential stage for a long-term test, of course, it is very necessary to do this step in stages
