风化煤复合包裹控释肥
weathered coal-based coated fertilizer
中包裹封
mid-package wrapping closure
粉煤灰混凝土
flyash concrete
fly-ash concrete
fly ash concrete
coal ash concrete
coal cinder concrete
Pulverized-coal Ash Concrete
powered coal ash
fly-ash-cement concrete
FA concrete
Strength prediction
粉煤灰地基
embankment of power plant