seam-sample of coal的意思|示意
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煤的缝样
seam-sample of coal的网络常见释义
煤层煤样 ... 煤样 coal sample 煤层煤样 seam-sample of coal 分层煤样 stratified seam-sample of coal ...
seam-sample of coal相关短语
1、 workable seam-sample of coal 可采煤样
2、 stratified seam-sample of coal 分层煤样