⎝⎛多人牛牛⎞⎠

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Horn

For frequencies of 20, 30, and 35 kHz, amplifiers with different amplitude ratios (Booster in English) are available. All horns are made of expensive titanium. Depending on the requirements, rigid or flexible retaining rings can be used.
手机电玩平台 炸金花 七乐彩 欢乐拼三张