The possibility of a problem 1-there is a focus that will adjust the pane of the pipe, while the standards do not think there will be impact, waste pipes, a 2-where do not identify limits employees to be careful.
The possibility of problems 1 - the staff are focusing to adjust the doors of the pipe to standard, while not expected to impact the pipe deformation. 2 - Position the adjustment does not specify a limit for employees carefully.
The possibility of problems 1 - employees are focused to the blooming of the pipe to meet the standards while do not think that will affect the pipe deformation 2 - position adjustable office not specified limits ให้พนักง work carefully.