What is drilling? What is the characteristics of drilling?
The initial position of the hole is called the orifice, the side is called the hole wall, and the bottom is called the bottom of the hole.
In the geological exploration work, the use of drilling equipment to drill into the underground diameter of the smaller depth of the larger cylindrical hole, also known as drilling.
This describes the drilling work in the exploration work, as well as the drilling tools and auxiliary tools and some measures.
Drilling refers to the use of drill bits in the physical material processing hole on the operation.
