Bucket excavator and Ladder-bucket dredger

Ladder-bucket dredger and bucket excavator are semantically related. In some cases you can replace phrase "Ladder-bucket dredger" with "Bucket excavator", this phrases are similar.

Bucket excavator and ladder-bucket dredger are semantically related. Sometimes you can replace phrase "Bucket excavator" with "Ladder-bucket dredger", this phrases are similar.