bera bottom continued to increase volume, down contraction, continued to increase volume as far as to see 15 positionsbera底部持续放量，下跌缩量，持续放量最远看到15位置

bera bottom continued to increase volume, down contraction, continued to increase volume as far as to see 15 positionsbera底部持续放量，下跌缩量，持续放量最远看到15位置
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