Cutting, drilling, engraving, and decorative processing of glass are various techniques and methods used to transform and adorn glass. These processes enable the creation of unique items and works of art and find wide application in various industries and areas. Here are several key aspects of each of these methods:

1. Glass Cutting: Glass cutting is a process in which glass is scored or split to create desired shapes and sizes. It can be a simple cut to make squares, rectangles, or circles, as well as complex geometric shapes. Glass cutting is often used in the production of windows, mirrors, stained glass, and other items.

2. Glass Drilling: Glass drilling allows for the creation of holes and openings of various diameters in glass surfaces. This can be useful in making stained glass, lamps, glassware, and other items.

3. Glass Engraving: Glass engraving is the art of creating patterns, designs, and text on glass surfaces. It can be done manually using hand tools or with the use of laser and lathe methods. Glass engraving is often used to create unique gifts, stained glass, and decorative pieces.

4. Decorative Glass Processing: Decorative glass processing includes various methods such as tempering, frosting, coloring, and sandblasting. These methods can alter the texture, color, and transparency of glass, making it more appealing for decorative and architectural applications.

Each of these glass processing methods has its unique characteristics and applications, and together, they offer a wide range of possibilities for creating diverse glass products, from functional items to works of art and decor.