Rashi on Numbers 4:14/רש"י על במדבר ד׳:י״ד

1מחתת THE CENSERS into which the coals were raked for the purpose of the ceremony of תרומת הדשן, removing a pan of ashes from the copper altar (cf. Rashi on Leviticus 6:4), and which were formed like a pan which has only three walls (none in front) and with the front of it draws in the coals.

2מזלגת — copper hooks (cf. Rashi on Exodus 27:3) which they stuck forcibly into the limbs that were on the altar in order to turn them over so that they might become thoroughly and quickly consumed.

3יעים are shovels; in O. F. vedil. They were of copper and with them they cleared the ashes from off the altar.