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Folding shopping cart liners have emerged as indispensable accessories for many shoppers, offering a...
folding shopping cart liner
2025-08-14 08:25
The Versatility and Elegance of 48-inch Round Tablecloths Tablecloths have long been a staple in hom...
48 Inch Round Tablecloth for Perfect Dining Experiences and Elegant Events
2025-08-14 08:07
Quando si tratta di scegliere una copertura per asse da stiro di colore verde, l'opzione giusta può...
Copertura del asse da stiro di alta qualità per l'Europa o il mercato degli Stati Uniti
2025-08-14 07:46
Enhancing your ironing experience often boils down to the accessories you choose, and none is more p...
ironing board cover with pocket
2025-08-14 07:45
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
2025-08-14 07:43
Teflon-coated shoes for steam irons have emerged as an essential accessory for household and profess...
iron shoes for steam irons
2025-08-14 07:14
Understanding the Cost of Iron Shoes A Comprehensive Guide for Consumers In today's intricate world...
iron shoes price
2025-08-14 06:58
An ironing board cover may seem like a minor household accessory, but its impact on your ironing exp...
Budget-Friendly Ironing Board Covers That Don’t Compromise on Quality
2025-08-14 06:48
Selection of the perfect wide top ironing board cover and pad is crucial for achieving those crisp,...
wide ironing board cover
2025-08-14 06:38
Choosing the perfect cover for your ironing board can elevate your ironing experience, especially wh...
dachshund ironing board cover
2025-08-14 06:28
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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