短語詞組短語specific alien surface 比表麪specific external surface 比表麪specific collecting surface 集塵麪積specific inner surface 比內(nèi)表麪specific grain surface 顆粒比表麪specific c surface area 比表麪積specific biomaterial surface 特異性表麪specific pore surface area 比表麪積specific fiber surface 纖維比表麪 返回 specific surface