A soundproof room (mute room) is a sound insulation testing device designed for product manufacturing workshops with testing requirements. The soundproof room is subjected to sound absorption treatment, making it a small silent room where small products such as precision instruments, motors, sound systems, transformers, etc. can be tested.

The three-way material distribution valve is an ideal equipment for controlling the rapid reversal of materials in material conveying systems, widely used for conveying solid particles and powders in industries such as building materials, metallurgy, mining, light industry, and grain.