"protect one's knees" — Kollokationen-Wörterbuch Englisch

protect one's knees Kollokation
Automatische Übersetzung (wir garantieren seine Korrektheit nicht): chronić czyjś kolana
  1. protect Verb + knee Substantiv
    Schwache Kollokation

    The front of the elbows were padded to protect his knees as, presumably, he knelt over his victims' corpses.