Push disc high zhouboji, left and right sliding desktop, the operation is two person operation, slide on both sides of the machine is hand push. This is the standard machine, the price is cheap.
Manual work long hours, artificial will be very tired, in fact, this long-term work, are very tired, I design is a sliding type, as long as you gently push
With respect to the OK, it is scientific and reasonable without difficulty. Otherwise people will not stand for a long time.

    .