... without being idle for later half year,4,With low energy consumption and high efficiency, equipment in medium and ... impacted,7,Spare parts not easily worn, cost low,8,The problem of sticking to disk for ... without being idle for later half year,4,With low energy consumption and high efficiency, equipment in medium and ... impacted,7,Spare parts not easily worn, cost low,8,The problem of sticking to disk for ...