For sheets to be bound in looseleaf folders or spiral-type bindings Done by a special machine that has a row of drills, which can penetrate a greater thickness of sheets than can punches
The act of boring a hole (1) to determine whether minerals are present in commercially recoverable quantities and (2) to accomplish production of the minerals (including drilling to inject fluids) Exploratory Drilling to locate probable mineral deposits or to establish the nature of geological structures; such wells may not be capable of production if minerals are discovered
(v) A process that uses a rotating cutting tool to produce holes It can also refer more specifically to a process that produces holes using twist drill bits
Boring into the earth to access geothermal resources, usually with oil and gas drilling equipment that has been modified to meet geothermal requirements
Holes for three ring binding are drilled, rather than punched The standard hole punch used in most offices can only punch a few sheets at a time However, a specialized drilling machine performs the same function on up to 1000 sheets in a single pass