backfilling coal mining hydraulic support的意思|示意
美 / /
英 / /
煤矿回填液压支架
backfilling coal mining hydraulic support的网络常见释义
充填采煤液压支架 ...充填采煤液压支架；充实率；机构优化；设计方法；检验标准 [gap=1314]Keywords : roof gap ；backfilling coal mining hydraulic support ；compression ratio ；structure optimization ；design theory ；inspection standard ..