... opening driving 开拓掘进 opening for drainage 排水巷道 opening of mine 矿体开发 ...
基于114个网页-相关网页
·2,447,543篇论文数据，部分数据来源于NoteExpress
Two structural forms can change under pressure to realize a water supply and drainage function of automatic quantify for a single opening.
两种结构形式均可依靠压力的变化，实现单口自动定量给排水功能。
youdao
应用推荐
模块上移
模块下移
不移动