(1) Fire sources such as sparks and welding slag shall be removed in time during on-site welding operations; The distance between the welding working point and the storage point of inflammable and explosive articles shall be greater than 10m.

(2) In areas with dense power grids, the measuring operation should avoid dangerous areas such as transformers and high-voltage transmission lines, and it is forbidden to use metal straightedge.

Safety training manual for geological drilling engineering