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2). Features:
1, the drill selects the motor through the high-performance reducer as the reverse power; Use cylinders for propulsion. The hydraulic system is eliminated, so the mechanical efficiency is high, the cost is low, and the performance is stable.2, with anti-card maintenance, when the drill is stuck, the motor is not easy to burn, the reducer is not easy to damage.
3, simple and easy to move, the weight of the drill machine is less than 500Kg, and can be broken down into three pieces, easy to move and put on the shelf.
4, the selection of rolling drag plate, the track is not easy to wear.
5, the drilling machine uses semi-automatic cloud dynamic disassembling drill pipe, high efficiency.

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A 20mm drill rod typically refers to a cylindrical tool made of high-strength steel, designed for use in drilling operations. Its 20mm diameter strikes a balance between robustness and manageability, allowing it to penetrate materials while maintaining sufficient structural integrity. The rod can be produced in various lengths, which can be tailored to the specific requirements of a drilling project. Additionally, many manufacturers offer drill rods with various coatings or treatments to enhance wear resistance and durability, making them suitable for use in harsh environments.


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At its core, submarine hammer drilling employs a powerful hammer mechanism to drive a drill bit into the seabed. The system utilizes both air and water pressure to deliver repeated impacts on the drill bit, which enables it to break through hard rock formations or sediments that might hinder installation efforts for marine infrastructure. The design of the hammer ensures that the energy is efficiently transmitted to the drill bit, allowing it to operate at significant depths.


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  • The size of the fence is another decisive element. The larger the area to be fenced, the higher the cost. This not only includes the material cost but also the labor for installation. Moreover, if the terrain is uneven or presents obstacles like trees or rocks, additional work may be needed, which can increase the overall price.
  • Furthermore, decorative cast iron or iron elements can be easily integrated into existing structures. Whether you are looking to update an old fence or add a decorative accent to a new railing, these elements can be seamlessly incorporated to create a cohesive and polished look. Additionally, they can be painted or finished to match the existing color scheme of your home, further enhancing the overall aesthetic appeal.
  • Furthermore, cast iron corner castings are relatively easy to install and maintain
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  • Meeting Rails: The lower rail of the sash where the two sashes meet when the window is closed.

  • If you’re looking into getting a metal fence, you might find yourself wondering for the first time: what’s the difference between cast iron and wrought iron? Both materials have unique strengths, characteristics, and historical significance that will affect the choice you make for your property.

  • Firstly, the material itself is a significant factor. Wrought iron, a malleable form of iron, is strong and resistant to corrosion, making it ideal for outdoor use. However, it's also one of the more expensive fencing materials due to its durability and aesthetic appeal. The current market price of iron, influenced by global supply and demand, plays a crucial role in determining the initial cost.
  • When it comes to installation, aluminium sliding windows are relatively straightforward. They can be installed by a professional window installer or even by a DIY enthusiast with some basic knowledge and tools. The installation process typically involves removing the old windows and preparing the opening for the new ones, followed by attaching the frame and glass panels. It is important to ensure that the installation is done correctly to ensure the longevity and performance of the windows.
  • Nowadays, the sound and shadow of aluminum alloy doors and windows on the market appear more and more frequently. Why are aluminum-alloy doors and windows so popular? Aluminum alloy doors and windows have excellent functions and good decorative effects. Many people will consider this door and window aluminum profile when choosing. How much do you know about this window frame aluminum profile? What are the performance characteristics of aluminum windows and doors?

  • In the realm of security and privacy, a metal box with a padlock holds a special place. This simple yet effective device has been a staple in homes, offices, and storage facilities for centuries, providing a sense of security that is both practical and symbolic.
  • In conclusion, the wrought iron heart is a beautiful and meaningful symbol that captures the essence of strength, resilience, and love. Its unique design and timeless appeal make it a popular choice for decor and gifts, while its sturdy construction ensures that it will be enjoyed for years to come. Whether as a decorative accent or a heartfelt gift, a wrought iron heart is sure to leave a lasting impression on all who encounter it.
  • When choosing adjustable screen door rollers for your home, it is important to consider the material and construction of the rollers. Nylon rollers are typically more affordable and lightweight, making them a popular choice for many homeowners. However, metal rollers are more durable and long-lasting, making them a better option for heavier or larger doors.
  • Balconies and Terraces: Aluminium window profiles can be used to create balcony glazing or terrace enclosures. The profiles offer protection from the elements while allowing light and fresh air into the space.

  • Upgrade your doors and windows with our premium hardware solutions and unlock a world of possibilities for enhanced security, style, and comfort. Experience the difference of quality craftsmanship and superior performance with SHIJIAZHUANG TJJ TRADE CO.,LTD.