It is well-known that the semi-conductor industry uses large amounts of water. A large portion of that water is used to produce deionized (DI) or ultra pure water. In the manufacturing process, DI water is used to rinse and clean semi-conductor wafers. Approximately 1,500 gallons of city...
The condition of the purification material must itself be monitored to ensure that the safety device will give the appropriate response when exposed to excessive amounts of impurity. [0014] U.S. Pat. No. 6,068,685 and U.S. Pat. No. 6,156,105 disclose protecting the purifier both ...
In order to ensure drainage fluently at the bottom of the karst cave and prevent the impact of excessive bottom water pressure on the superstructure, the part below the elevation of 1008 m was backfilled with block stones, the block diameter not less than 30 cm. In order to ensure fluent ...
In order to ensure drainage fluently at the bottom of the karst cave and prevent the impact of excessive bottom water pressure on the superstructure, the part below the elevation of 1008 m was backfilled with block stones, the block diameter not less than 30 cm. In order to ensure fluent ...