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Zhengzhou Defy Mechanical & Electrical Equipment Co., Ltd.
Reliable Machinery Manufacturer Since 1970S
Zhengzhou Defy Mechanical & Electrical Equipment Co., Ltd. locates in High-tech zone of Zhengzhou City, China. Our factory dedicates to manufacturing drilling rigs... More
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22
Mar
Item 1. 1105#, 10 teeth, double nozzle design, special tailoring, fast footage, strong stability, perfect to work in rock, stone areas. Item 2. Bevel-toothed diamond bits are good for pebble formation, sand-bearing formation, broken formation and compl
21
Mar
Customer from HangShaoTai Highway Tunnel project gave feedback today: begun to drill from 21:23 last night, and end drilling at 23:33 o’clock, lasting 2 hours and 10 minutes, finished 120 holes with 3m depth each. It totally consumes 1 pc drill bit. A
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