FIG. 18 is to show the active fishing reel to reduce the drag force for ultra-long-drive disclub golf; (A) is the partial exposed view of the active fishing reel to reduce the drag force for ultra-long-drive disclub golf; (B) is the motor mechanism of the active fishing reel to ...
In this case, the support force provided by the coal increases with increasing deformation; therefore, it is feasible to simplify the immediate roof below the main roof, coal and gangues as elastic media, and the load of overlying strata of the main roof as the uniform load. Therefore, the...