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- The design of rock drilling rods is a blend of science and engineering prowess. They are generally hollow, allowing for the circulation of drilling fluids, also known as mud or coolant, which serves multiple purposes. It cools and lubricates the drill bit, removes cuttings, and stabilizes the borehole. The rods' surface finish and thread design significantly influence their performance and service life.
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- Fastening Kits



tunnel bench drilling bit. Whether you are working on a small-scale tunnel project or a large mining operation, there is a tunnel bench drilling bit available to meet your requirements.
Molded FRP Fabrication Procedures


Hengshui Jrain’s FRP products can be widely used on field of water treatment, wastewater treatment, odor control, etc.
Available in 1” deep, 1” x 4” pattern, rectangular mesh FRP gratings are commonly used for walkways and trench applications. When selecting rectangular mesh grating it is important to specify the span (rectangular opening) of the grating perpendicular to the supporting structure.