Advantage&Feature: 1. QT40-3C e gg laying block making machine can produce all kinds of hollow blocks, solid bricks just by changing corresponding block moulds.. 2. 16# manganese steel, use high-temperature carburizing, the hardness is HRC54-58.. 3. Welding rod with high quality guarantees the welding quality. 4. QT40-3C can be operated easily by wokers who just learn the skills in a short time.