Do you think it is safe to carry artificially in the community? When people are fatigue, they are also lost. How many people can do 10 pounds of cement with 10 pounds of cement, and how many people can do not fatigue? Who can imagine if you lose your feet in the back transport? Will it be pressed by 100 pounds of things on the body without rolling? Who is the injury of the carrier? employer? Do you still care about yourself? As long as the protection measures and equipment safety inspection operations are regular, there will be no problems.