Hot rolled round bars are a versatile and essential material in many industries. They are widely used in construction, manufacturing, automotive, and other fields, delivering strength, durability, and reliability for a wide range of applications. These ba
The mask is dust-proof, shatter-proof and smoke-proof, and the filtration efficiency exceeds 98%. This mask is made in the United States, with excellent quality and trustworthy.
The electrical maintenance training device is rich in content, extensible, the circuit can be freely combined, training students' hands-on ability, and getting comprehensive training from design circuit, electrical appliance selection, planning layout, el
1. Lighting circuit installation2. Fluorescent lamp circuit installation3. Installation of single-phase watt-hour meter4. Installation of sound-light control street lamp circuit