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The concrete (usually with steel bar) is poured directly into the stable and solid roadbed, and the new line of ordinary sleeper and gravel bed is not used. This kind of line is clean, suitable for large volume and difficult maintenance area, especially for tunnel, underground railway, port wharf and stone road base. But its construction investment is big, if because of the construction slapdash or basement instability, concrete layer fracture, cure difficulty. China's overall Taoist route in the tunnel is more than 300 kilometers long
Note that the epoxy adhesive curing speed varies depending on temperature. At higher temperatures it dries faster, but has less resistance and firmness. During the winter you might also leave a few minutes in double boiler pots, and try to take certain temperature (never to be more than 30 degrees at all), like too cold, the information becomes more complicated, thus a viscous mix.
While the doctor can directly observe the inner ear canal through the ear lamp or the mirror, the earwax can be taken out directly with a q-tip or medical tweezers. When the earwax has formed and the earwax is hard to remove, the doctor can also use ear drops to soften the earwax. The softened earwax is expelled from the external auditory canal and is easy to clean.
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