大型浅-中层堆积层滑坡
large-scaled shallow-medium cumulate landslide
薄层碳质板岩
Thin-layered carbonaceous slate stratum
硅－碳质层
silicon-anthrinoid stratrum
渗碳层质量
quality of carburized layer
腐植质分解物堆积层
humus-decay accumulative layer
A0 layer
聚电解质层层涂覆
polyelectrolyte multilayers
有机质堆积
Accumulation of organic matter