SYMMETRIX

Drilling machines; drilling machine tools, namely, bits, reamers [, electric hammers, pneumatic hammers, hydraulic hammers, and air powered hammers ] ; parts of drilling machines and drilling machine tools, namely, drilling steel in the nature of casing shoes, shanks, rods and casing strings; parts of drilling machines and drilling machine tools, namely, drill bits for rock and earth drilling, [ concentric core drilling bits, coring pilot bits, coring reaming bits, ] drilling rods, drilling pipes, overburden drilling casing pipes, shaft drilling casing pipes, extension drill rods, extension drill pipes, casing pipes, jointing sleeves and guide bushings for drilling rods and drilling pipes