In 2011, the sales volume of HDD Machine was a medium-sized drilling rig with a pullback force of 25-50 tons, an increase of 240 units year-on-year, and continued to become the main model; followed by a pullback force between 50-100 tons The number of drilling rigs increased by 31 units year-on-year, with a long range of 23.0%. From this, it can be clearly seen that market demand continues to concentrate on medium-sized drilling rigs.
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