round head spiral的意思|示意
美 / /
英 / /
圆头螺旋
round head spiral的网络常见释义
圆头螺丝 圆头铆钉 cone-shapedal head rivet; round head rivet 圆头螺丝 round head spiral 圆形及卵形尺 amphitheater and ambit adviser ..