网页CN104204400A CN201380016107.9A CN201380016107A CN104204400A CN 104204400 A CN104204400 A CN 104204400A CN 201380016107 A CN201380016107 A CN 201380016107A CN 104204400 A CN104204400 A CN 104204400A Authority CN China Prior art keywords slotted disk cable derrick connector pivotally connected Prior art date 2012-03-23 Legal status (The legal status is an assumption and is not a legal conclusion.