Using object: high level drain net.
Functions: lay earth fabric and high level drain net under the buried hermetic covering, It is proves that, if the buried site constructed on weak, various, complex earth, adopt drain net under the foundation system, it can be reinforce and drained quickly.
y earth fabric and high level drain net under the buried hermetic covering, It is proves that, if the buried site constructed on weak, various, complex earth, adopt drain net under the foundation system, it can be reinforce and drained quickly. 
