zì dòng huàn dāo zhuāng zhì
automatic tool changer (ATC)
自
zì
(bound form) self; oneself
动
dòng
(of sth) to move
换
huàn
to exchange
刀
dāo
knife; blade; single-edged sword; cutlass (CL:把[ba3])
装
zhuāng
adornment
置
zhì
to install