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我队自从1983年以来,使用侧壁压煤器(以下简称压煤器)补取煤心,已经收到了明显效果。例如:12线4号孔于孔深524.58米处见
Since 1983, our team has used the side wall coal briquetting machine (hereinafter referred to as the coal briquette machine) to make up the coal core and has already received the obvious effect. For example: 12 line No. 4 holes in hole depth 524.58 m see