। ॥ १७४ ॥
In plain words
The two of them, working like a pair of hands, will get this done — its own proper work, and they will get it done. Just as a lamp leaps up into full flame when someone straightens the wick.
Close to the Sanskrit
Like a hand, the pair will accomplish the proper work of this one — just as a lamp blazes up by the act of straightening (its wick).