spherical head without folded edge的意思|示意
美 / /
英 / /
球形封头，无折边
spherical head without folded edge的网络常见释义
无折边球形封头 ... sperically dished head 球状碟形封头 spherical head without folded edge 无折边球形封头 takeshapes of closure 封头的成型 ...