upper blade guard
/ʌnlˈəʊdɪŋ ˈdɒks/
n
English · upper blade guard中文 · 锯片上部护罩Español · guarda fija del discoFrançais · protège-lame supérieur
意味：Fixed sheath covering the upper part of the blade to protect the user’s hands and prevent sawdust from escaping.