pacity smokemeter [仪] 消光烟度计

optical smokemeter [环境] 光学式烟度计

auto smokemeter 全自动烟度计

art-flow smokemeter 部分流式烟度计

filter type smokemeter [环境] 滤纸式烟度计

photocell type smokemeter [仪] 光电烟色表

end-of-line smokemeter [环境] 外装式烟度计

diesel automobile smokemeter 柴油车烟度计

full flow opacity smokemeter 全流消光式烟度计