Exhibit Profile：
series of power tongs for drill pipe, casing, tubing and the monitoring system for them, and swivels for drilling use, hydraulic power units, series of hydraulic winches, a variety of rotary tables and roller kelly bushings, traveling block and hook, etc.
Exhibits show：
series of power tongs for drill pipe, casing, tubing and the monitoring system for them, and swivels for drilling use, hydraulic power units, series of hydraulic winches, a variety of rotary tables and roller kelly bushings, traveling block and hook, etc.
Exhibits show：
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