... ,easy to operate,flexible,working stable&reliable&high efficiency. Three- row Boring Drill Machine (MZ213T) 1. Performance & characteristicsThis machine is ... of processing functions done at the same time. And single row can be used for 0-90 ° rotation, complete the ... , large-scale, high-volume, high technology requirements of multi-row porous hole site of wood bit efficient production process. 3 ...