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Also known as the sleeper plate circuit. It is a prestressed concrete sleeper plate, which is laid in a compacted bed, and the wires are filled with asphalt or other materials. The prestressed concrete sleeper plate is 55cm wide and twice as wide as the normal prestressed concrete sleeper, with the same length and thickness as the ordinary prestressed concrete sleeper (see color map). Therefore, the contact area between the wide sleeper and the daoist bed doubles the contact area between the normal sleeper and the daoist bed, thus reducing the pressure on the bed
Let's face it, just like 99% of drivers, you most probably get in your motor vehicle each day without ever giving your windshield another thought. After all, it's hardy some art, a minimum of not until it crack or shatters. With cars designed the way they are nowadays, it truly does take a tremendous collision to shatter a car's windshield, but cracks are a different kettle of fish altogether.
In the field of archaeology, most of the evidence are metal, such as musket bullet, cartridge, bullets, artillery and shells, shrapnel and/or of the sword, what are the specific evidence depends on the battle took period of history. Thus, the most important tool for field archaeologists is simple metal detectors
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