וּמִשְׁמַרְתָּ֗ם הָאָרֹ֤ן וְהַשֻּׁלְחָן֙ וְהַמְּנֹרָ֣ה וְהַֽמִּזְבְּחֹ֔ת וּכְלֵ֣י הַקֹּ֔דֶשׁ אֲשֶׁ֥ר יְשָׁרְת֖וּ בָּהֶ֑ם וְהַ֨מָּסָ֔ךְ וְכֹ֖ל עֲבֹדָתֽוֹ׃
and their charge the ark, and the table, and the candlestick, and the altars, and the vessels of the sanctuary wherewith the priests minister, and the screen, and all that pertaineth to the service thereof;
Rashi on Numbers
והמסך AND THE SCREEN — i.e. the Partition Veil, for it, too, (cf. Rashi on v. 25) is called מסך in the phrase (Exodus 40:21): פרכת המסך.
Rav Hirsch on Torah
V. 31. והמסך ist das פרכת המסך (Schmot 39, 34), der den ארון schützende Scheidevorhang.
Chizkuni
וכלי הקודש, “and the holy vessels;” these are the ones enumerated further on.