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Combination drill
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Commonly used combination drills can be divided into: combination insert roller cone bit, combination steel tooth cone drill bit, combination scraper drill bit, which are respectively applied to hard, medium and soft formations. In rescue drills, a combination drill bit of a corresponding diameter should be configured according to the drilling diameter designed by the construction process of the rescue hole.
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MULTI-FUNCTIONAL SURVEY SAMPLING DRILL RIG

2020-09-23
Established in 1975, Hebei Shitan Machinery Manufacturing Co., Ltd

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