Handhole and manhole openings的意思|示意
美 / /
英 / /
手孔和人孔开口
Handhole and manhole openings的网络常见释义
手孔和人孔开孔 girth joins（see circumference joints）环缝接头（见环向接头） handhole and manhole openings 手孔和人孔开孔 heads into shells 封头接入壳体 ..