[請益] 要怎麼投出有咻咻聲的球?
之前遇到會咻咻叫的球
接的時候蠻有壓力的
因為知道這種球比自己投的軟趴趴球還要快
接個不好，手會超痛的或被打到會超痛的
=======================
現在想請問前輩們要怎麼投出這種球呢?
聽說手腕要扣
但我不懂
這樣不是會讓球往下跑?
還是說只要球速提升到某個程度就跑出咻咻聲，扣不扣不是重點?
請大家給我點建議，謝謝。
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