Alter Aeon Online Help

Keywords are:  'skill thief trapmaking making mechanical'

Skill: trapmaking               Lvl 33 Thie  (42%)
                                (helpful)   Requires: salvage equipment and trapping
                                Group: Thief tinkering
                                Profession

The 'trapmaking' thief skill permits a thief to install and
repair mechanical traps.  It also gives him a better chance of
detecting and disarming such traps, and mechanical traps yield
better salvage when removed by a thief empowered with this skill.

Mechanical traps are more expensive and complicated than the booby
traps one would build using the 'trapping' skill alone.
Examples including hidden fusillades and grenades traps.