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In the world of home essentials, ironing board covers often don't get the attention they deserve. Ye...
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2025-08-14 21:23
Trouvez le Couverture Idéale pour Votre Petite Planche à Repasser Lorsque l'on parle de repassage, l...
Couvercle de planche à repasser pour petite planche à repasser
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غطاء طاولة الكي الأزرق هو أحد العناصر التي تضيف لمسة من الأناقة والجمال إلى منزلك، مع توفير وظيفة حي...
غطاء لوحة الكي الأزرق
2025-08-14 21:05
Finding the right ironing board cover can be challenging, especially when seeking specific dimension...
110cm ironing board cover
2025-08-14 21:04
The Charm of Round Picnic Table Covers A Perfect Addition for Outdoor Gatherings As the warm sun beg...
Round Picnic Table Cover for Outdoor Dining and Special Occasions
2025-08-14 21:02
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 20:53
Folding Table Covers Combining Functionality and Style When it comes to hosting gatherings, whether...
folding table covers
2025-08-14 20:29
When it comes to setting up a remarkable display at trade shows, events, or even in commercial space...
6ft table cover
2025-08-14 19:37
The Ultimate Guide to Choosing a Big Board Ironing Board Cover Ironing can often feel like a tedious...
Large Board Ironing Board Cover for Optimal Protection and Style
2025-08-14 19:34
The perfect glove steamer can revitalize your daily routine, breathing fresh life into an old pair o...
glove steamer for sale
2025-08-14 18:53
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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