The SZ-200 down the hole drill  is one kind facile, highly effective, the multi-purpose rock drilling drilling implement, its basis different geology invites the situation available air, the froth either the mud carries on the rotation or impact drilling. Applies generally in the industry and agriculture hydraulic engineering, may drill the crag water well, examines the oil well logging and other pours out searches the bore-hole, applies specially in geothermy heating hole drilling. May also satisfy the project foundation reinforcement, the gravel loose stratum to enter, the bedrock with the tubular drill to offer a far-fetched interpretation and so on many kinds of project demands.