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An ironing board cover may seem like a minor household item, but for those seeking optimal ironing r...
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2025-08-15 08:22
For many households, ironing is a necessary chore, but it doesn't have to be mundane. Decorative iro...
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Exploring the realm of ironing board covers can lead you into a world of unusual designs and feature...
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The Importance of Choosing the Right Ironing Board Cover A Focus on 150 x 50 cm Sizes When it comes...
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Promotional tablecloths have become an indispensable asset for businesses aiming to amplify their br...
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Embracing Elegance The Charm of Blue Plaid Tablecloths In the world of home décor, few items can tra...
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2025-08-15 07:10
An ironing board isn't just a household accessory; it's an essential tool for ensuring your clothes...
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2025-08-15 06:33
Selecting the ideal rectangle tablecloth can transform any table setting into an elegant and invitin...
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2025-08-15 06:23
Teflon, a renowned name primarily associated with non-stick cookware, has made its unexpected yet gr...
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2025-08-15 06:16
Găng tay tạo kiểu chống nhiệt Giải pháp hoàn hảo cho tóc Trong thế giới làm đẹp, việc tạo kiểu tóc k...
Găng tay chịu nhiệt
2025-08-15 06:01
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  • 3. Open-air drilling rig: according to the different working mechanism of crushing ore and rock, it is divided into steel rope percussion drill, drilling rig, cone drill and rotary drill. Because of low efficiency, the steel rope percussion drill has been gradually replaced by other drilling RIGS. The drill pipe drives the pneumatic impactor and the drill bit to rotate together, and the piston of the pneumatic impactor is used to impact the drill bit to break the ore and rock, which is usually used in small and medium-sized mines to drill holes with a diameter of 80 to 250 mm. The roller drill uses the rolling action of the roller bit to break the rock and is suitable for drilling holes of 150 ~ 440 mm in diameter on the hard rock. It has the advantages of high efficiency and low labor intensity, and is widely used in large and medium-sized open-pit metal mines. The drill consists of an impactor (or drill bit), a rotary mechanism, a lifting mechanism, a pressure device, a walking mechanism, a slag discharge system, a drill frame and a drill pipe. Rotary drilling machines are only suitable for drilling softer minerals and coal. The common feature of these devices is that the degree of automation is getting higher and higher, and some functions realize the application of intelligent i GPS technology on these RIGS, which realizes the automatic positioning of the boom, saves the time of field marking and positioning, improves the efficiency of the operation, and enables the operator to concentrate on monitoring the process of drilling. At the same time, more attention is paid to safety and environmental protection and the improvement of human-machine relationship. With the impact of the implementation of engine emission regulations, mobility, intelligent handling and environmental regulations Tier 3/ Euro ⅢA emission regulations, most foreign rig manufacturing companies have adopted diesel engines that meet the emission standards