3 adjectives to describe converter

In order to secure themselves against the spying, armed converters, they hit upon the idea of masking a number of their party, so as to keep their superstitious opponents at a distance, and thus, protected by caricatures of devils, to finish in peace the pure worship of God.

irresistible converter!

This consists essentially of a converter about 1 meter outside diameter, and 1.5 meters high, connected by a single trunnion to a horizontal steel shaft carried by the arm of a hydraulic crane which is very similar in character to the ladle crane of a large sized converter.

3 adjectives to describe  converter