collar screw是什么意思

网络释义

1)collar screw,有环螺丝2)eye screw,环首螺丝3)collared bolt,有环螺栓4)flapping screw,带舌环螺丝5)screw-back earring,螺丝夹耳环6)The screw hasn't been tightened.,螺丝没有上紧。