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The Charm of Thick Table Cloths Elevating Your Dining Experience When it comes to setting the perfec...
thick table cloth
2025-08-15 22:08
Finding the perfect 80-inch round tablecloth can transform your dining experience, turning a simple...
80 inch round tablecloth
2025-08-15 22:05
Finding high-quality cheap white tablecloths in bulk can be a daunting task for many event planners,...
cheap white tablecloths bulk
2025-08-15 22:04
An ironing board cover measuring 125 x 38 cm is not just a household accessory; it is an integral co...
ironing board cover 125 x 38
2025-08-15 22:00
97cm x 33cm 다리미판 커버: 집안 다림질의 품격을 높이는 필수 아이템 고품질 다리미판 커버는 효율적이고 깔끔한 다림질을 위한 핵심 요소입니다. 특히 97cm x 33c...
다리미판 커버 97cm x 33cm
2025-08-15 21:55
Heat resistant gloves for ironing are an essential tool for anyone who frequently handles ironing ta...
ironing board cover
2025-08-15 21:28
The allure of vintage ironing board covers is undeniable, captivating homemakers and collectors alik...
vintage ironing board cover
2025-08-15 21:21
An ironing board cover might seem like a mundane household item, but when you choose an animal print...
animal print ironing board cover
2025-08-15 20:14
The Importance of Sleeve Ironing Board Covers A Comprehensive Guide When it comes to ironing, many p...
sleeve ironing board cover
2025-08-15 20:02
Gone are the days of using dreary, uninspiring ironing board covers that make an already mundane cho...
funny iron board covers
2025-08-15 19:42
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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