And others bound in fetters.
Others were placed at his disposal.
and others joined together by (iron) fetters
And others fettered in chains
And others tied to each other in the shackles/chairs
They were all at his disposal
And other demons bound in chains
And others bound in fetters
And (also) other jinn bound in chains
And others (among them, who were) bound in chains
And also others bound in fetters