drainage holes的意思|示意

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drainage holes相关短语

1、 check valve drainage holes 逆止式排水孔

2、 a line of drainage holes 排水井列

3、 densely distributed drainage holes 密集排水孔幕

4、 burr holes irrigation and drainage 钻孔冲洗引流术

5、 cross drainage drilling holes 穿层抽放钻孔

6、 High-level holes gas drainage 高位孔瓦斯抽放

drainage holes相关例句