round robin
1 statement, petition, etc signed by a number of people, often with signatures arranged in a circle to conceal who signed first 圆形签名陈情书、 请愿书等（签名排列成圆形, 故分不清先後）.
2 letter sent in turn to members of a group, each of whom adds sth before sending it on to the next 传阅的信件（各成员传阅并签注意见）.