A.0.27KN/S B.1.2KN/S C.0.55KN/S D.1.55KN/S
A.31.60KN B.37.27KN C.31.55KN
A.無機(jī)性粉塵 B.有機(jī)性粉塵 C.混合性粉塵 D.空氣揚(yáng)塵