The scope of products involved includes: rock drilling machinery, road rollers, excavators, earthmoving machinery, direct circulation rotary machinery, long spiral construction machinery, rotary excavation machinery, submersible engineering drills, static pile drivers, rotary drills, reverse circulation rotary drills, pile drivers, impact rotary drills, impact reverse circulation drills, derrick cranes, floating cranes, single-beam cranes, marine deck cranes, and marine cranes, etc.