Lack of knowledge about the characteristics and quantities of emissions from wood stoves is a major contributor to uncertainties in global emission estimates for particulate material. 科学家不太清楚木柴炉子所排放的物质的性质和数量,这是造成全球颗粒物(PM)质排放估计不确定性的一个主要因素。
Stationary source emissions - determination of concentration and mass flow rate of particulate material in gas-carrying ducts - manual gravimetric method 固定污染源的排放-气载尘埃颗粒流量和浓度的测定-人工重力法
The effect of different structural factors and factor levels on particulate material dry indexes was explored by such drying tests. 通过干燥试验揭示了不同结构因素和因素水平间对颗粒物(PM)料干燥指标的影响。