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DTH drilling refers to a method where the drilling bit is located at the end of a drill string, below the surface of the ground. This technique is distinguished by the use of high-performance percussion hammers, which are positioned on the drill bit. DTH drilling involves the use of compressed air to deliver rapid impacts, breaking rock into smaller fragments. This method is particularly effective in hard rock formations, making it a preferred choice for mining operations and various drilling applications.


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1.Downhole drilling machine: When drilling a downhole gun hole with a aperture less than 150 mm, in addition to the application of a rock drill, it can also be used to drill a small diameter of 80 ~ 150 mm. When drilling a gun hole with a diameter of less than 70 mm in coal or softer mineral rock, it is generally used to drill or air drill, driven by a motor (or air motor) to drill the drill pipe, and the rock (coal) chips drilled out are discharged through the spiral groove on the drill pipe.

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  • When you think about sewing, clothes are the first thing that pops into your mind. But there are a lot of other jobs that use heavy duty sewing machines. One of these jobs involves upholstery – the process of covering furniture, such as seats, paddings, sofas, etc. with fabric or leather covers.

  • The backstitch is a fundamental sewing technique that serves to secure the start and end of a seam. Traditionally, this process required the sewist to manually reverse the stitching at both ends of a seam, which could be tedious and time-consuming. With the advent of sewing machines equipped with an automatic backstitch feature, this tedious step has been streamlined. The machine automatically stitches backward for a few stitches, locking the seam in place without any manual intervention.


  • In the realm of crafting and textile production, heavy-duty sewing machines have established themselves as indispensable tools for both professional and hobbyist sewists. These machines are engineered to handle thicker fabrics and heavier workloads, making them essential for projects that require durability and strength, such as upholstery, outdoor gear, and various heavy crafts.


  • Ultimately, the best computerized sewing machine for you will depend on your specific needs, skill level, and budget. Always considering the features that matter most to you will help narrow down your choices. Whether you’re sewing garments, quilts, or home decor items, investing in a good computerized sewing machine can elevate your projects and inspire creativity in your sewing journey. Happy sewing!


  • Are you in the market for a new sewing machine? Look no further, as we have a wide selection of high-quality pattern sewing machines for sale. Whether you are a beginner looking to start your sewing journey or an experienced seamstress in need of an upgrade, we have the perfect machine for you.
  • 5. Finishing Touches Once the quilting is complete, adding borders, binding, and labels can transform your quilt further, giving it a polished and finished look.


  • Chain Stitch Sewing An Overview of Technique and Applications


  • In the fast-paced world of fashion and apparel, efficiency and precision are paramount. As the demand for high-quality garments continues to grow, the garment industry has turned to technology for solutions. Among these innovations, automatic sewing machines have emerged as game-changers, particularly in shirt manufacturing. These machines represent a significant leap forward in automating the sewing process, offering a myriad of benefits for manufacturers and consumers alike.


  • However, if you are looking for a machine that deals with all of these even easier, and more comfortably, and also want to sew up a few patterns you have always wanted to try but are not exactly suited for a basic machine, then a budget, domestic heavy-duty machine is the way to go: an easy to use, simple non-computerized HD sewing machine.

  • Understanding Lock Stitch Machines An Overview


  • Maintenance Tips


  • Another noteworthy aspect of cylindrical bed sewing machines is their adaptability to different sewing materials. Whether the fabric is lightweight like chiffon or heavier like denim, these machines can be adjusted to ensure optimal stitch quality. The ability to switch between different types of materials without compromising performance makes cylindrical bed sewing machines a favorite among manufacturers who deal with diverse product lines.


  • Heavy-Duty Sewing Machines: While priced higher than standard domestic machines, they are considerably more affordable than industrial machines. They strike a balance between enhanced capabilities and cost.

  • Where to Find Double Needle Walking Foot Sewing Machines for Sale


  • A cylinder arm sewing machine is a type of sewing machine that is commonly used in various industries for sewing cylindrical and other difficult-to-reach items. The cylinder arm refers to the cylindrical shape of the arm of the machine, which allows for easier maneuverability when sewing items such as bags, shoes, hats, and other cylindrical items.