TY - GENERIC DO - 10.20944/preprints202307.0079.v1 UR - http://dx.doi.org/10.20944/preprints202307.0079.v1 TI - Ballast Pick-Up Velocity in the Vertical Pipe of an Excavating Machine Slurry System T2 - Preprints AU - Wang, Yang PY - 2023 DA - 2023/07/04 PB - Preprints