phone repairing tools

HAVE you ever wonder the tools phone eng use to repair your phone?? HOT AIR MACHINE:it also known as hot air rework station .it use sold and desold clips components and to melt down rusted part on the phone bot or screw such as SMPIC,BGAIC,etc we can also adjust air pressure &temparature according to the requirement. pls if you want to know more ,kindly vote thanks