Added electroplating fumes, soldering fumes, lead solder, non-lead solder, gasoline vapor, noise, road traffic noise, aircraft noise, secondhand smoke, environmentally persistent free radicals, and pneumatic drill.
I added a parent term for the two solders and a parent term for noises. Please see that you agree with the placement of noise and the placement of EPFRs, and pneumatic drill.
Added electroplating fumes, soldering fumes, lead solder, non-lead solder, gasoline vapor, noise, road traffic noise, aircraft noise, secondhand smoke, environmentally persistent free radicals, and pneumatic drill. I added a parent term for the two solders and a parent term for noises. Please see that you agree with the placement of noise and the placement of EPFRs, and pneumatic drill.