The technique requires considerable financial investment as the pressure vessel has to withstand the internal gas pressure and allow the powder to be heated to high temperatures.
因为压力容器必须经受住内气压并允许粉末加热到较高温度，所以这种技术需要相当可观的资金投入。
2
The plsama modification of powder like material has been carried out by adding rotating cylinder in the vacuum vessel.
普通的表面处理仪难以处理粉体材料，通过加装旋转滚筒，实现了粉体材料的表面改性处理。
3
The leaf powder movie-making, may observe the glandular hair, the non-glandular hair(2~6 cells)and the spiral vessel;