两个小问题pinch point和sign off? 1. “pinch point” :in crane safety jha. a pinch point is a point at which it is possible for a part of the body to be caught between moving parts and/or moving and stationary parts of equipment. the ansi definition of pinch point is as follows: "points at which it is possible to be caught between moving parts, or between moving and stationary parts of a piece of equipment." 2. sign off : 签名并表示结束查看更多