Coarse grain for soft and expandable material 软而且展性大的材质时用粗粒
A new technology on filling in and sealing against leak with expandable materials is introduced in this paper , which is applied in drilling in limestone area 摘要本文介绍了石灰岩地区钻探施工中,利用液体高膨胀材料充填、堵漏新工艺。