Explanatory notes
… directly from the end of a boom or jib (shovel excavators, drag shovels, etc.) or, to increase the working range, on a … or by means of a hydraulic jack suspended from the jib (draglines). In long range excavators (slackline draglines), … models are designed for digging or cleaning out trenches, drainage channels, ditches for use in open‑cast (open‑pit) …