unstayed flat heads and covers的意思|示意
美 / /
英 / /
未停留的平头和盖
unstayed flat heads and covers的网络常见释义
无支撑平封头和盖板 ... torispherical head 带折边的球形封头 unstayed flat heads and covers 无支撑平封头和盖板 welded on head 焊制封头 ...