我相信你以前没有购买过这种设备，这个机器主要根据浓度来决定机器的型号，

I believe you have never purchased this kind of equipment before. This machine is mainly based on the concentration to determine the model of the machine. It has nothing to do with other factors. The concentration between 30% and 60% is the best! If it is less than 30%, the machine processed will get a thin layer of material, and most of the rest will be water. Very low benefit

I believe you have not purchased this kind of equipment before, this machine mainly according to the concentration to determine the machine model, and other factors do not have much to do with the concentration between 30%-60% effect is the best! If it is less than 30%, the machine is machined to get a thin layer of material, most of the rest is water. The benefits are low

I believe you haven't bought this kind of equipment before. The model of the machine is mainly determined by the concentration, which has nothing to do with other factors. The concentration of 30% - 60% is the best! If it's less than 30%, after machining, you get a thin layer of material, and most of the rest is water. The benefit is very low<br>