Make sure the tattooist sterilizes needles to be used in an autoclave (a heat sterilization machine).
(the tattooist; sterilizes; needles to be used in an autoclave (a heat sterilization machine)) (needles; to be used; L:in an autoclave)
the tattooist needles
sterilizes to be used
needles to be used in an autoclave (a heat sterilization machine)
L:in an autoclave