soil stratum造句

1、The filling coefficient theory was put forward, a criterion for the filling coefficient of soil stratum failure and a critical hydraulic gradient chart were formulated.

2、By use of 453 groups of piping test data, verification was made to the existing 7 analytic methods for stability of soil stratum permeability at home and abroad.

3、Finally, we suggested that the problem on stability of the bench mark may be settled in certain area by using the bench mark with a casing pipe buried in the proper depth of soil stratum.