DTH technique was used in well drilling exclusively to dig, accurate, vertical bores, and rotary drilling was used to turn the hole. The Directional DTH system, patented by Atlas Copco, was first used. [pdf]
Every year, drill rigs and other heavy, specialty equipment used for deep foundation construction (Figure 1) overturn potentially causing injuries and fatalities, as well as damage to the surrounding s. [pdf]
According to archaeology sites discovered within the region, there were human beings inhabited in the today town of Baini () Sanshui District about four thousand years ago. Sanshui County was established in the fifth year of (1526) in the Ming Dynasty. It was temporarily merged into in 1959, revoked and restored in 1960, and reorganized into a in 1993. In 2002, it was reorganized into a district and belonged to Foshan City. [pdf]
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