How long does a one-time course of laser therapy take? 30 minutes or an hour?
一次性激光治療需要多長時間？ 30分鐘還是一個小時？
The length of time depends on how many places need to be lasered. A session that is for a single location will take around 30 minutes
時間長短取決於需要激光照射的地方有多少。單個地點的會議大約需要 30 分鐘