Another angel: the second one in this vision.

The temple in heaven: as in verse 15.

He too had a sharp sickle: the Greek word for sickle is the same as in verses 14-16, but this sickle is for harvesting grapes. In some cultures the tool for harvesting grapes is different from the one used for harvesting grain. In such cases it will be helpful to say, for example, “a knife (or, machete) for harvesting grapes.” For the figure of harvesting grapes as the final Judgment, see Joel 3.13b.

Quoted with permission from Bratcher, Robert G. and Hatton, Howard A. A Handbook on The Revelation to John. (UBS Handbook Series). New York: UBS, 1993. For this and other handbooks for translators see here .