Getting out the coal : stripping-underground mining-loading machines-roof support /
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| 主要作者: | |
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| 格式: | 圖書 |
| 語言: | English |
| 出版: |
New York :
McGraw-Hill,
1926.
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| 版: | 1st ed. |
| 叢編: | Practical coal production.
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| 主題: |
| Item Description: | Includes index. A sequel to its predecessor: Preliminaries of coal mining. |
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| 實物描述: | vii, 403 p. : ill. ; 21 cm. |