1. Shaftless Electrical Mill Roll Stand (4 sets)  Symmetric structure for non-stop paper change; electric control (paper lifting/clamping/centering); pneumatic tension + braking; expansion-type paper clamp (adapts to 350-1400mm paper diameter).2. Dual Single Facer Machine (2 sets)  Negative pressure adsorption design (uniform corrugation forming); corrugated roller (48CrMo, HRC58, medium-frequency quenching + hard chrome plating); airbag pressure control; electric glue amount adjustment; easy-to-clean glue system.3. 5-Layer Gluer Machine  Cast iron frame (high stability); independent frequency conversion motor per layer; PLC-controlled coating gap; stainless steel glue tank (automatic circulation); dynamic-balanced glue rollers (glue saving).4. Heavy Double Facer Machine   S-shaped steam flow (high heat efficiency); pneumatic pressure ...