In the public housing construction project at Lots E and F of Pak Kok Kei, Macau, the full-casing full-rotation drilling rigs used on site were one DTR2605H and one DTR2005H, both manufactured by Dunan Heavy Industry. They successfully completed full-casing cast-in-place piles of Ф1000 mm with a depth of 98 m and Ф2000 mm with a depth of 102 m.
　　The Guilin section of the Guiyang–Guangzhou High-Speed Railway has the most complex geological conditions along the entire line. Karst formations are extremely developed, with the largest karst cavity reaching nearly 17 m, and most are unsaturated fill. Multiple karst caves overlap in a single pile foundation. The final solution adopted full-rotation drilling rigs to drive permanent steel casings with a diameter of Ф1500 mm and a wall thickness of 26 mm directly through multiple layers of rock and karst caves to the pile-end bearing stratum, with the deepest pile reaching 80 m.