First, the concept and role of formation grouting
Grouting includes three aspects: water control, ground reinforcement and foundation reinforcement.
Second, the engineering classification of the grouting method and the applicable conditions of various grouting methods
.......
First, the analysis of the direct top
The completeness of the direct roof depends on two factors: one is the mechanical properties of the rock formation itself, and the other is the development of the bedding and fissures caused by various reasons in the direct top rock stratum.
.......
The price index of the petrochemical industry released by the National Bureau of Statistics shows that in February 2012, the cumulative index for the petroleum and chemical industr.......
.......
Mr. Peter.......
Guidance: Laser marking machine worktable XY axis is not accurate, it will cause great errors on the processed products. If the problem can not be resolved in time may affect the delivery time of the product, the following brief introduction of the laser .......
For the engine of the car, they need the right oil, so buying oil can't just buy expensive, buy one. The use of oil should be based on different models, different seasons, driving environment and other factors. Recently I saw a friend who wants to know what kind o.......