| 摘要 |
A longwall shearer mining machine that is mounted on a rail generally includes a first chassis portion with a first cutting arm mounted thereto and a second chassis portion with a second cutting arm mounted thereto. Each of the first and the second chassis portions is slidably coupled to the rail. The first and second chassis portions are coupled at a pivot joint. The pivot joint allows each of the first and the second chassis portions to adjust its respective orientation with respect to a horizontal ground plane when the articulated shearer travels over a hump or a valley, thereby maintaining sufficient headroom.
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