Vertical leakage-proof technique is critical in vacuum preloading treatment for improving consolidation of soft clay sediment subsoil with deep sand inclusion. 摘要对于深厚夹砂软土地层进行真空预压加固，侧向密封是个薄弱环节。
The acidity is too large in the sand inclusion to printing to speed up the ink emulsive spoiledour Teletext Foundation for ink does not balance the staves of water. 而碱性过大的润版液则便当腐化印版砂眼，增速油墨乳化，爱护图文本原，也会因火墨不不平衡而引起火杠痕。
