foundation treatment in soft formation 软弱地基处理

soft-formation 软岩

ultra soft formation 特软地层

underlying soft formation 下卧软土层

soft-formation cutter head 软岩用三翼岩心钻头

soft formation with sticky layer 黏软地层

Colony formation in soft agar 克隆形成实验

soft-agar colony formation test 软琼脂集落形成试验

soft agar clone formation assay 软琼脂细胞集落实验