upward drainage hole的意思|示意
美 / /
英 / /
上排水孔
upward drainage hole的网络常见释义
仰孔 ... 仰斜掘进：advancing to the rise 仰孔：upward drainage hole 阳离子浮选：cationic flotation ...
upward drainage hole相关例句
Result shows that drainage effectiveness of upward hole has an obvious advantage over that of plumb hole.
结果表明，仰孔的排水效果明显优于铅孔。