Through-flow drilling system for hole row and dowel hole drilling, inlet belt transport foldable approx. 900 mm long, through-flow transport with belt conveyors and stop elements, outlet belt transportation foldable about 1,200 mm long and 5 vertical drilling supports from below with 2 aggregates each, one 11-spindle drilling head with 32 mm grid, each 1 horizontal drilling unit left/right, per aggregate a 21-spindle drill head, all unit adjustments with LED position indicators, 5 clamping bridges from above with 2 pneumatic pressure elements each, chip conveyor belt below, front light barrier monitoring, Siemens control Simatic C7-626,