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 successf. [pdf]
In the Jiaozuo Administrative Region, human tribes existed as early as the matriarchal commune period, more than 8,000 years ago. The Xia dynasty was under the jurisdiction of Jizhou a. .
Jiaozuo has a temperate ( BSk) with four distinct seasons; owing to the shielding influence of the , temperatures in the urban core of Jiaozuo are warmer than in. .
In 2020, the GDP of Jiaozuo City reached 212.4 billion yuan, and the general public budget revenue exceeded 15 billion yuan. In 2019, the city's GDP reached 276.11 billion yuan. .
According to the results of the seventh national census, as of 0:00 on November 1, 2020, the permanent population of Jiaozuo City was 3,521,078 people. Compared with the 3,539,860 people in the sixth national census in 2. [pdf]
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