pulsation spot welding

例句：

1. 1. The heart'spulsation can be felt throughthe chest wall.
   心脏的搏动可以通过胸壁感受到。
2. 2. The pulse of the oceanis a constant reminder of life'srhythm.
   海洋的脉动是生命节奏的不断提醒。
3. 3. The doctor checked her pulseand found it to be steady.
   医生检查了她的脉搏，发现它很稳定。