散在空气中的小颗粒迅速形成一朵乌云,久久不散。不是黑云浓重,是铅灰色的一团。这是一袋水泥和地面接触的瞬间腾起的粉尘,一朵没散去,另一朵又升起来了,密集,凝重。据说这种粉尘分散度高,轻则会使毛孔堵塞,引起皮炎,重则可能产生矽肺病,最终致命。方玉林看着余大海在他面前表演。是的,是表演,没有错。方玉林确定这就是表演。 Small particles scattered in the air quickly formed a dark cloud, a long time to go. Not dark clouds, is a gray lead. This is a bag of cement and instant contact with the ground rising dust, one did not disperse, the other rose again, dense, dignified. It is said that this high degree of dust dispersion, ranging from the pores will cause congestion, causing dermatitis, may result in severe silicosis, the ultimate fatal. Fang Yulin looked Yu Dahai in front of him. Yes, it’s a show, nothing wrong. Fang Yulin determine that this is the show.