械系

械系	xiè xì	to arrest and shackle / to clap in irons
械	xiè	appliance / tool / weapon / shackles / also pr. [jie4]
系	xì	to connect / to relate to / to tie up / to bind / to be (literary)
系	xì	system / department / faculty
系	jì	to tie / to fasten / to button up
系	xì	to connect / to arrest / to worry