毁坏, 弄糟, 皱起脸, 粗心地弄皱, 捏成一团

hexagonal screw

TAPPING metal or other material [= screw-threading]

electric screw driver【机】

screw-plug fuse

drive screw (hammer-drive screw)

screw conveyer for distributing matrices, spaces in composing machines

propulsion with ground-engaging cylindrical screw drives

kneading screw (kneading worm)