Sampling holes of measuring points which have been hatched on piping shall be wrapped with cloth of the sealing glue to prevent foreign objects from falling into the pipe
Sampling holes of measuring points which have been hatched on piping shall be wrapped with cloth of the sealing glue to prevent foreign objects from falling into the pipe
Sampling holes of measuring points mà past tense hatched on piping shall only be wrapped with cloth of the sealing glue to Prevent Foreign objects from falling into the pipe