Hot News - Qingdao Haitongda Special Instrument Co.,Ltd.

PetroChina set a new record for large-diameter long-distance directional drilling crossing in China
2020-08-25
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The National Oil and Gas Resources Exploration and Exploitation Bulletin (2019) was released-in 2019, China's oil and gas exploration investment reached a new high (authoritative release)
2020-08-25
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