PVC AUTOMATIC MIXING & FEEDING SYSTEM;SRL-W SERIES HEATING/COOLING MIXER UNIT;SRL-Z SERIES HEATING/COOLING MIXER UNIT;SYLW-SPIRAL BELT HORIZONTAL MIXER;FULLY AUTOMATIC SMALL FORMULA MACHINE;CONTINUOUS LIQUID LOSS SCALE;LIQUID WEIGHT LOSS BATCHING SYSTEM;PVC POWDER DUST REMOVAL SYSTEM