The lead channel has many different cross-section, however, select any profile is optimized for, depending on many factors. In the design process, it is necessary to pay attention to the requirements, combined with the pros-cons of each type of profile to be the proper choice. In addition, to ensure a stable product, the length of the stalk from the trench to spray each pleasing the mold must have the same length and diameter. To calculate, arranged so that the mold in a pleasing balance flow and pressure.
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