When the pipeline trench ditch harming workers or other personnel <br>roll tube accident <br>hanging pieces fall <br>to touch the transmission line <br>roll, hanging pieces fall, hurt others
Injury to workers or other personnel in the trench when the pipeline is under the trench<br>Roller accident<br>Hanging piece fall<br>Touch the power line<br>Roll over, drop, injury to others
Injury to operators or other personnel in the trench during pipeline laying<br>Pipe rolling accident<br>Pendant fall<br>Touch the transmission line<br>Overturning, falling of lifting parts, injury to others<br>