By developing executable plans to resolve extensive challenges without causing harm to individuals or the environment, the ...

Abstract: Drill rods are core components to transmit the power in drilling machines such as raise bore machine, petroleum drilling rig and geological exploration rigs. Owing to its importance and high ...

The giant sinkhole opened up on Monday night at AJ Burkitt Reserve in Heidelberg. The hole, which has been fenced off in an exclusion zone, is near where twin tunnel boring machines are digging the ...