... works of metal plate and workpieces Metal chemical engraving machine /etching machineJM650 Double Sided High Precision Etching MachineParameters: ... 2 unitsEtching Speed0.5~6.5 M/Min (adjust)Machine Size3550*1650*1550mmWeightAbout 800kgsAutomatic Control System:Speed adjust system ... making TV shadow masks,metal craft,nameplate,tags,metal label,decorative plate,grids,shims,metal gobos, washers, sieves, ...