| 摘要 |
making a waterway for water flow in the front/rear parts of diaphragm forming a side wall by an edge between a main body and a rim of an external case which consists of a top-opened rim and a rear panel; mounting a bobbin at the center of a neck of a damper of a bracket; making water to flow into the waterway by vibrating diaphragm; and generating a sound in the underwater direction.
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