"In order to deal effectively with reactive clays, a
drilling contractor must be able to identify reactive soil conditions,
understand how and why clay reacts the way it does, and know how to modify the
behavior of reactive soils."
A
hardhat primarily is to protect a person from being injured ... Wearing a hardhat also signifies that the person’s personal safety is
important to him. Many
people dislike wearing a hardhat; I don’t understand why.
The primary function of the pressure tank in a pumped water system is to protect the pump motor, which is accomplished by storing water under pressure so the pump does not have to come on every time there is a small, intermittent demand for water.
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