您要查找的是不是：
- self-acting piano link regulator (清棉机的)天平杆自动均匀装置
- 史蒂夫·里奇和他的《钢琴相位》(Piano Phase,1967)Steve Reich and His Piano Phase
- 这跟听别人弹钢琴不一样,那你能参地进去共同欣赏,摄影这玩意儿,制作和表演之间要隔很长时间。It's not like listening to someone practice the piano, where you can be part of it.In photography, production and performance are separated by a long time span.
