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Rock Drilling and Heat Treatment Process for Spherical Thread Button Bit *, *::before, *::after {box-sizing: border-box;}* {margin: 0;}html, body ...
2025-07-27 00:16:00
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... and high productivity. There are mainly four types of end face design forms used by down-the-hole drill bits: namely, end face convex type, end ...
2025-06-21 00:38:33
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*, *::before, *::after {box-sizing: border-box;}* {margin: 0;}html, body {height: 100%;}body {line-height: 1.5;-webkit-font-smoothing: antialiased;...
2025-06-21 00:33:27
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*, *::before, *::after {box-sizing: border-box;}* {margin: 0;}html, body {height: 100%;}body {line-height: 1.5;-webkit-font-smoothing: antialiased;...
2025-06-21 00:33:24
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*, *::before, *::after {box-sizing: border-box;}* {margin: 0;}html, body {height: 100%;}body {line-height: 1.5;-webkit-font-smoothing: antialiased;...
2025-07-27 00:16:00
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*, *::before, *::after {box-sizing: border-box;}* {margin: 0;}html, body {height: 100%;}body {line-height: 1.5;-webkit-font-smoothing: antialiased;...
2025-07-27 00:16:00
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*, *::before, *::after {box-sizing: border-box;}* {margin: 0;}html, body {height: 100%;}body {line-height: 1.5;-webkit-font-smoothing: antialiased;...
2025-07-27 00:16:00
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*, *::before, *::after {box-sizing: border-box;}* {margin: 0;}html, body {height: 100%;}body {line-height: 1.5;-webkit-font-smoothing: antialiased;...
2025-07-27 00:16:00
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... play a significant role in all DTH drilling, regardless of application, rock type, hole depth or drill rig. The key features of a high quality DTH ...
2025-06-21 00:38:41
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*, *::before, *::after {box-sizing: border-box;}* {margin: 0;}html, body {height: 100%;}body {line-height: 1.5;-webkit-font-smoothing: antialiased;...
2025-07-27 00:16:00
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